Definition of plane confuse a lot of folks. This video may not use the same terminology as TGM, but it has some very important visuals.
'the' plane - the plane of force that sustains the line of compression (1:07 mark) the path of PP#1 (given zero accumulator #3 in this case) This is a far better visual of plane than Hogan's pane of glass IMO.
the 'follow through' - both arms straight
very clear demonstration of the 'flying wedges' (2:50 mark)
And the importance of using impact fix as a guide to setup (5:17)
Keeping in mind that Moe's #3 accumulator angle was near zero, his motion is an outstanding example of TGM.
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"Support the On Plane Swinging Force in Balance"
"we have no friends, we have no enemies, we have only teachers"
Simplicity buffs, see 5-0, 1-L, 2-0 A and B 10-2-B, 4-D, 6B-1D, 6-B-3-0-1, 6-C-1, 6-E-2