It's tough getting old. I ended-up getting Tendonitis from using my 750 to pump-out 10k+ rounds over the last year, so am looking to add an Auto-Drive to it. The Lyman/Mark 7 is $2k (!), while the Ponsness-Warren drive is $1k. Obviously I am looking at the latter motor. Whom here has experience w/ it, the Mark 7, or the Fast and Friendly Auto-Drive?