Follow-up... I don't have the RSM kit here to compare. It's already in Salina. But what I do have are the Aero Engineering plans, and the remains of an authentic kit-built Veco Thunderbird that my uncle put together, along with the RSM website. Again, I built the Aero Engineering kit, and its an exact clone of the built T-bird in every way. Right down to how the parts don't fit right because the die cutting was off.
The specs on the Veco/Dumas/Aero Engineering Tbird are as follows.
Wing Span: 56" Wing Area: 610 sq. in. Length: 38"
The specs on the RSM Tbird from the website
http://www.rsmdistribution.com/kits/kit-thunderbird-ii.htm are as follows.
Wing Span: 56" Area: 570 sq. in. Length: 39"
Also if you review the RSM website, it never states anywhere that the kit they offer is the same as the Veco kit. It's the same situation as we have with the Nobler. There are countless versions of the Nobler being kitted, published, arf'd, etc and no two are the same. The RSM kit may very well be more authentic to Palmers design, but the fact remains that it's not the same plane as the Veco/Dumas/Aero Engineering kit. I'd check with Eric, except out of the five times I've tried calling RSM, four times I've gotten an answering machine, and the three emails I've sent haven't been replied to. The one time I did get through was to order the kit nearly 10 years ago.
It would really be nice if I didn't have to back up every statement I make with another resource. A little debate is healthy, but it's getting to the point where it's easier to just not contribute.
3rd edit: removed close-up of specs. I didn't think they'd be legible on the larger plan shot.