Outer Limits 4x4 Board

hey guys i'm getting my exo built up and was wondering what size tube i should use for it you know what have you guys used is it strong enough
and any tips in building the exo
by the way its going around a patrol ute cab

i use 32nb heavy wall for main pillers ect
and 25nb heavy wall for braceing

remember it all about tirangles

triangles you mean behind the cab and on the roof don't know where else to put triangles

well remember that if a point is to take a hit it must go off in 2 directions so if you can fit in extra tri. to make to impact point deflect in more then one dection this well be a better exo