RE: 3dhobbyshop.com Sabre
you need to use accelerator when it goes on thick, especially in recesses. epoxy and depron ,5min 10 min 12 min 24 hours... won't make a lick of difference, it will not adhere. at least not to the sabre... it adheres fine when sticking to a rough surface but the glossy outer shell of the plane needs some sort of caustic glue to "attack" it as it cures...
I'd really like to try my hand at a extra 300s I think i'll get one. My setup apparently pushes an easy 26oz thurst. all my electronics together (4 servos, rx esc, wires, prop motor and pack) weigh under 200 grams...
How much did your empty airframe weigh?
Also i will use epoxy if i build one, but i will "stretch" it considerably with microballoons. This dramatically reduces weight, particularly where the epoxy ends up filling a larger gap or hole. The same gap can be filled with a fraction of the weight of the same volume of epoxy.