Build Pool Shot Alignment From the Floor Up

Give the entry one job

Decide the object-ball pocket and intended cue approach before lowering. Carry that decision into a comfortable supported address. If the target changes, stand up and decide again; a new plan is different from a small verification of the same plan. Keep the cue close and controlled while walking, not pointed across another person’s space.

The PBIA mechanics outline treats alignment, stability and clearance as related stance concerns and lists aiming while standing separately. The handoff card below is an original observation exercise, not a copied assessment, a proprietary named drill or a certified ability test. It checks the transition rather than asking whether all bodies should look alike.

Calibrate a repeatable personal vision center if the straight reference itself looks inconsistent before you enter.

Check static balance and cue clearance if the chosen line is reachable but the settled stance cannot support it comfortably.

Freeze a real-pocket reference

Use ball-center coordinates on an illustrative 100×50-inch bed: x=0..8 along the length, y=0..4 across it, origin at the lower-left cushion-nose corner. One unit is 12.5 inches. Equal 2.25-inch balls have radius 0.09 and diameter 0.18 units. Intact-cushion center limits are 0.09..7.91 and 0.09..3.91; six real pockets interrupt the boundary at four corners and (4,0),(4,4). Measure your actual bed, balls and mouths before scaling. Remove measuring aids before play; do not mark a competition table.

Place object center O(6, 3), aim toward real upper-right pocket P(8, 4), and use intended first-contact cue center G(5.839003, 2.919502) with cue start C(4.944576, 2.472288). G=O−0.18u and C=G−u, where u=(2,1)/√5. The centers are collinear and G is one diameter behind O, not a spot inside the object ball. There is no required cushion contact or predicted cue-ball finish.

Choose an ordinary comfortably controlled pace with no intentional sidespin. Keep equipment and ball positions fixed. Use a rear-line camera outside the rail, stroke path and walkways, with permission from anyone identifiable. Capture standing selection through bridge landing; register the intended line before the block and remove that reference aid. A visible cue axis must be compared in the same view, not inferred from a lamp reflection or a camera placed off line.

Rehearse six entries without a strike

Repeat six entries, withdrawing the cue safely and returning upright each time. Do not swing the cue at chest height or freeze and rise while leaving the cue hovering over the ball. For each entry record observed preserved, observed changed, or unknown. Maximum six observed-preserved entries is a count, not six pot points.

A camera can show visible drift or an obstruction, but it cannot prove the exact contact line or your internal sight picture. Report unknown when the cue axis is obscured or the view is not registered. Avoid forcing your chin over the cue or copying a fixed foot arrangement to satisfy the picture. Stop for pain, instability or an unsafe reach; use suitable support rather than stretching farther.

Use eight strikes and two separate records

Take eight baseline strikes from C with one selected approach routine. One allocation is the preparation ending in one actual strike; any safe resets before it belong in that same row. A stopped allocation is unused, not a made-up miss. Record the actual strike count and reset count separately.

Give a process score only when the standing plan and the entry are observable. Score 0 for no settled standing plan or a known change of that plan while down; 1 for a settled plan followed by visible entry drift or a reset to recover that line; 2 for the settled plan preserved through bridge landing without observed drift or a reset. This does not require ignoring an unsafe condition to earn two. Any safety concern overrides the exercise.

Record a known legal pot as one outcome point and a known miss or foul as zero, independent of process score. Process maximum is sixteen and pot maximum eight only if all eight corresponding observations are known. Unknown process and unknown outcome reduce their own denominators independently; neither becomes zero automatically.

Assign near and far visual jobs when the transition is repeatable but attention has no clear task.

Improve the recording before diagnosing drift when unknown entries outnumber useful observations.

Read the disagreement, not just the pot count

Hypothetical eight-row process record: 2,2,1,0,2,1,2,unknown. The seven observed rows total ten of fourteen possible process points; the eighth contributes no assumed points. If five of eight known shots were potted, the separate outcome is five of eight. These invented numbers demonstrate bookkeeping, not measured improvement.

A pot with a process score of zero does not establish a sound entry; a missed shot with a score of two does not prove that entry caused the miss. Incorrect aim, delivered contact and table response remain other questions. Use repeated visible evidence to choose a small change, not a diagnosis from cue-ball sideways movement after collision.

Examples of bounded changes are starting from a more repeatable safe location or placing the bridge only after the chosen approach is comfortable. Do not simultaneously change head position, feet, bridge length and pace, then credit the combined change to alignment.

Retest one change and transfer to the other corner

Make four new strikes from the same C after one comfortable entry change, retaining the same camera and scores. Retest ceilings are eight process points and four pot points, reduced independently for unknowns. Do not edit the baseline rows or combine the two blocks to hide a poor comparison.

For four separate transfer strikes mirror x→8−x: O(2, 3), P(0, 4), G(2.160997, 2.919502), C(3.055424, 2.472288). It is a second real corner pocket and a separate eight-process/four-pot ceiling. Keep the same handoff task; this is not a new cut-angle or cue-ball position drill.

Six unstruck rehearsals plus eight baseline, four retest and four transfer strikes means sixteen actual strikes and twenty-two planned entries only when all allocations finish. Extra resets add preparations, not strikes or additional score rows. End with one entry cue you can actually repeat and a note about any unresolved view or comfort limit.

Test a recurring delivery issue separately if the line survives entry but the subsequent stroke is the supported next question.