I don't how much more lifting power you would need with the 7.5 amper. It does lift with athourity!!! Much more than I can crank going counter clockwise on the winch( forgot the gear ratio ) 16 to 1 ?? I think.
Anyway, Any hand type winching is going to have it's limitations short of using a winch truck. The limitations I have found have been not so much with the drill but more with the number of wraps you can get on the capstain before the rope loses traction on the capstain. If your using Stable Braid 5/8 it will lift and hold a hell of a load but is limiting for lifting because of the number of wraps you can get on the capstain. You can put more wraps using 9/16th's thus getting more lifting power and traction and still be able to hold a load compareable to a what a 5/8 th's will hold. The work horse rope we use is 12 strand True-Blue. It gives the most wraps on the capstain, good traction and speed for lifting. I like True Blue better than Stable Braid in 1/2 in. because it is easier to work with and seems to give better traction on the winch than Stable Braid.
I don't think I need to tell you this LJ but for others that might be reading and thinking about a GRCS drill generator set-up. The most limiting factor for lifting is not so much the drill or the winch but more how the notches and particularly the hinge and how thick it is that hinders a big lift. All factors that go into a heavy lift have to work in harmony or otherwise it doesn't give the desired results. The same goes for a doing a snap cut if a piece doesn't need to be lifted so to speak but just tensioned a little. The exacusion of the cut is more important than the hardware.
