RE: Sig LT40 or GP PT40 for first build in ten years?
I built a LT-40 as well.. And it builds pretty well.. Pretty straight and true out of the box.
Other's may disagree, but personally, my opinion, the "40" in LT-40 is a being conservative. I think it's a lot closer to a 60.
I only do electric, but if I were going glo, I'd put a 55 sized motor on it. Then get a 4-star-40 to build. Once you're done with the LT-40, the 4-star-40 would fly quite nicely with the 55 motor...