So my 3401 died after 2.5 years and over 120 details..... I had a Rupes 15E and it died after probably 30 details. I have a PE-14 rotary for my heavy duty jobs but I'd like to have a good DA for my regular jobs. Is the Rupes 21 worth the extra $20? Right now the 3401 is $299 @ AG (which is a helluva deal) but the Rupes 21 is $319. I'm afraid to pull the trigger given my last experience with the 15. Thoughts?