More consistent pattern IMO would be 10-18-A (or even C) and 10-24-E. Perhaps I've moved into the 4th barrel/hit however.
10-18-B can be quite powerful and 'effortless', but depends greatly on zero interference with CF and a very well educated pivot (Bobby Jones).
10-18-A is Off Plane Clubshaft Backstroke. He was pushing for 10-18-C.
10-18-B is Anti-Flat Left Wrist. But, Homer urges, demands, requires the Flat Left Wrist from Start-up to Both Arms Straight. Homer didn't like to be incomplete so he included it as a variation. He was so funny. He dealt with 10-18-B Golfers in a very sly way. He purposely withheld the Power Package Assembly Point for Golfers using 10-18-B (FLW/BRW). It would be 10-21-F DOWNSTROKE RELEASE SWIVEL, which doesn't exist. A missing Piece?
Ahh! It's in the TGM Unabridged Edition: "Complete TGM". I'm working on the "Cliff Notes". It's not mentioned in: "Homers Greatest Hits" Vol. 1 (Hitters Bible). But it is thoroughly explained in "TGM For Swingers".
I'm sure, by now, if Homer was publishing, the 20th edition would be very complete and 400 pages.
A Masterpiece.