I'm is there any way to bump up the psi on the hydro pump on my 130. My son wants to get into pulling and I thought it would be a good tractor to start with for it's simplicity of use. It will be in the stock tractor class and I'm not expecting it to pull massive amounts of weight. I pulled with it a couple of years ago and I was only able to pull 1250lbs 1" before the relief valve open on the pump. If I could get it so it was a little more competitive for my son that would be great.