I've got a 400X. Overall build time was about 6 hours. Only trick was cutting the groove for the spar. Foam is hard to cut without an extremely sharp blade. I ended up using a hot knife tip on a soldering iron. I used packing tape to cover it but later removed it and covered it with low-temp iron on film. The weight is a few ounces over, but it's not bad flying. I also changed props. The Graupner Trick R/C recommends runs well, but I kept losing them. The center would loosen and the motor shaft would spin out. I bought an aluminum adapter and now run a 6x3 Master Air Screw. It's had the same prop for over a year.

Wing itself is very durable. I've run it full tilt into a basketball goal post. Picked it up, flight-checked and tossed it again Learning how to toss it is fun. I hold it wrong, but it works.

LHS stocks canopies, so all out nose dive when battery broke the tray and canopy wasn't too bad. ($15)

Just flew it today. First battery is charged and the second is 1/2 way done on the Triton.