steering lock when turning right...possible fix raise fron end?

i have s honcho and im having problems with the steering ...it locks some times after a large rock/bump and the screw that holds the steering arm to the servo gets stuck ....what other sugestions without raising the center of gravity of the truck? fileing down screw head? or plastic part....(witch will be made into alu. very soon... too much flex in the frame and suspension

not sure i get it right. is it the servo horn that hits the plastic brace on the frame?

or please take a pic

its alright i fixed the problem by raising the front and rear by 1/4inch so it would bottom out be4 it gets to the crossmember but it does affect cg quite a bit i find....any other ideas......make a curved plexiglass crossmember?