I haven't run into the problem of motor mount or body flex with the two carbon tubes crossing under the mount and the Extreme strapping tape folded over top to bottom under it. The 27C mount is pretty darn strong in my experience and will take a lot of abuse. I think I've only cracked one and that was after numerous bad wrecks.

Refer to later on in the old thread to read about a guy glassing his Stryker using sheets of carbon fiber and Kevlar (sp?).

HXT900 Servos: Yep, they are tough and great little servos. I'm currently flying them in a homemade glider with a 6 foot wingpsan using a HXT 35-36 1100 k/v motor. This plane is very fast and has unlimited verticle. Not a problem yet with these servos controlling this large/fast plane. I'd still suggest that Strker owners run HS81 (now called HS82) servos on it, but if you got to be cheap the HXT900 should work fine provided you link the control rod to the top hole on the servo arm and maybe the second one down on the horn to avoid undue stress.