In another post I mentioned that I burned up my hammer drill mixing joint compound.  I'll be replacing it with a Milwaukee hammer drill.  I also own a Milwaukee hole shooter that I've had for years.  However, I have been told that I should not expect a pistol grip drill, even a heavy one, to handle mixing joint compound.  Because, this type of use will wear out the drill prematurely.

I need something that can handle mixing pre-mixed drywall mud, setting type mud, tile mortar and tile grout.  I only have to mix this stuff a few times a year, but I don't  want to risk burning out my good drills.  Someone suggested a D-handle type drill with reduction gearing.  I suppose I could pick up a used, a recon, or even a harbor freight, since it won't see a lot of use; more as a fill in to save my good drills.  

I'd like to ask then, what do you use for mixing?  Anyone have experience with a recon or harbor freight D-handle?