It's possible to do caster adjustments on ibeam by using shims on the mount plate. You can also get a degree or two by just loosening the bolts and shifting it slightly. Believe it or not, the sequence the bolts are tightened can change it 1 or 2 degrees...which has a huge effect on stability. It's common on heavy duty trucks like the 3/4 ton and up, to put a bit of negative caster in. Going to a more positive caster, the wheel centers itself easier and is a bit more stable. Tough part is finding an alignment shop that will do it. I use an alignment system from eastwood that can nail it. It's not a true 4 wheel alignment but I can at least get toe right and adjust caster a bit. I'll be doing this to mine along with tightening up the gear box slightly...that should remedy or greatly improve the wander on rough roads. As for the stiff ride...its all in the springs. Shocks will dampen but not change how stiff it feels. I'm keeping the stock absorbers on because I can change fluid viscosity. It's currently a 7 weight. I'm going to try a 15. I know itll be stiff, but should slow the rebound down quite a bit hopefully to reduce the bouncing effect.
