I know plastiguage is "controversial" at best and YOU know how difficult it is for the "occasional" builder to read the mic's with good accuracy. I don't use it by itself, I use it to double check my work and always encourage others to do so. There is no reason at all that the plasti shouldn't fall well within range IF you have measured correctly to begin with.
Gessford's I'm not, but George was most helpful while supplying not only parts for my build but excellent technical advice along the way. And my hats off to Neil, engine assembly man, Gessford Machine for his "Marvel Mystery
Oil" piston assembly tip, which also created some "controversy" during the build.