[Lmackattack]

I flip the 5th wheel around on the plastic plate. Then bolt the plate back down to the frame.

A standard setting s 9" ahead of center on 1:1 trucks. But I find the rc trucks need more to get the weight up front.( gravity does not scale)

The turning problem you are having is that the locked axel is pushing the steer axle .i lock both my axles and have the same issue with my tractors as you do. I placed my battery over the trans to get as much weight up front.They turn much better in loose dirt. Also the stock tamiya springs are to soft and you end up riding on the axle stops when pulling a trailer with any weight on it. This compounds the push effect on the steer axle. I once added a little WD40 to the 5th wheel and it helped a little but can get messy.

It's a problem you live to deal with if you want a truck to get thru the dirt.