Duane, in post #124 you say you revised post #189. Now I'd have to say that's a pretty good trick! So far the only real problem that I have run into is with the bottom block between formers F2 and F3. In my particular case that block could have been an eighth of an inch wider. Ultimately, I added a sixteenth inch shim to both sides from the front to the rear of this block, which solved my gap problem.