Neil. I think your right, the biggest problem with this setup is there's no way to get rid of the heat. We'll have to ask Izzy to show us a better picture of the one he put in Travis's dozer. I'm not sure if he makes them or found them for sale. On Elliot's post for his ADT he has a picture up with a stand alone relief valve that looks well built. I've asked him to see if the manufacturer will sell them separately. Post #76 picture #9
http://rctruckandconstruction.com/sh...?t=1204&page=4
Rob