I have heard nothing but good about the LT 40.
Our club helped an engineering Explorer post build four or them (four teams of three or four kids and one adult builder per team - I think I was the adult). I can tell you there doesn't seem to be a wrong way to build an LT-40, and it is an ideal trainer. There must have been two pounds difference in the weights judging from the amount of glue used or not used by the teams. When you get good, put floats or skis on it and you will never outgrow it (at least not for my style of fun flying).
I swear, one team was three girls and they built an LT-40 with not quite one third of a bottle of an 8 oz. Titebond II. I thought it was going to crumple on landing . . . but as far as I know it is three years and many students along and holding up. Of course, my team was perfect and one of the others used TWO BOTTLES of Titebond II. Of course, most was on the waxed paper or in drp puddles between parts that was later chipped off. They all flew.