do you have any recommendations as far as 90 size helis go?
I haven't kept up on recent ones. The guys at R R are knowledgeable on state-of-the-art. The MA line is still one of the best tho. Like anything, you get what you pay for.
Assembling a big heli is like the coolest Erector set (google it)around. For example, one doesn't just start bolting things together. The threads have to be cleaned so that the threadlocker will hold. Nothing like a big nitro or gasser heli!