The only thing that i think would save the loader arms on the compact tractors would be you could center the forks and hopefully not side load. I do think the ripper would be the best for small tractors though. I always wanted to put a snow blade on the little bobcat tractor we had but read some bad things about twisting arms because the loader arms weren't strong enough if the snow blade caught anything off center.I've dug out a far number of rocks with a set of pallet forks! I think on a tractor, a ripper on the 3 point is likely to be a bit more stout though. The loaders aren't as heavy or tough as a skid-steer loader so you probably want to be a little careful of you use a set of forks on one to pop out rocks.