TT2, the thing you're missing here is although the funtana .90 might be an all out 3D model, it was designed and is advertised as being able to perform F3A schedules. I wouldn't ever push a .90 to advanced trainer speeds but it should be able to go those speeds without parts ripping out left and right.

in my .40 i didn't 'hammer' the servos in but the rib still cracked

trust me on this TT2, go read adverts for the funtana .40 and .90 and it will say it can perform a full F3A schedule