Your JT looks real heavy duty. I will strongly recommend that you do something about the wimpy stock idlers in the back. Daryl turner makes some great parts as do others. I make my own for my JTs by flipping the clamping brackets left to right (and R to L). I then add a tension spring to the empty screw holes for the hull and attach them to the hull floor or torsion springs. You will need more than the stock springs can offer for that BEAST. Will it get and IR system, elevation and recoil?

Bob