WID - Horizontal Stab
I just went out and looked at mine (hanging from the ceiling - built a couple of years ago) and I had (at most) 3/16" overhang at the inboard location and 1/4" at the outboard end. Yes - this is significantly less than called for in the plans, the "scaled" callout on Drwg. 15 is approx 3/8" at the root and 5/16" at the tip. But what you don't find out until later is that you have to trim back the overhang to allow the up/down movement of the elevator to the design specs + a bit of clearance for convenience. I think you will find (when you get there), that some of the original trailing edge will need to be removed to allow the correct rotation of the elevators. I remember the "cutting and fitting" process, and when I got it where it needed to be, what I had left was about 3/16 & 1/4.
YMMV
David Howe
RV-4 S/N 1136 Built - 1600 Hr. flown - Sold
HR II S/N 002 Built - 900+ Hr
RV-3 S/N 11226 Jigging up Fuselage