I love the tool - just ticked they didn't do anything for those of us who bought version 2 with its design flaws. They should have done a trade in or something for version 3. Kind of hate to give my money to companies who lack good customer service.
If memory serves, our local HM rep Ollie (whom I adore and
still miss, he now does double-decker bus sales) came in with the DM3 right before it hit the market and said HM was honoring a credit toward the price of a new DM3 for anyone who had a DM2 that was bought within a certain time frame.
I'm not sure if we didn't do a good job getting that message across to our local guys, or if your tool fell outside of that window.
I've not seen any repair problems with the DM3 as far as breakdowns of the head or fins (except one, and that was an abuse situation where the whole head had to be replaced). The biggest "repair" is that the set screw on the knob gets loose and can cause leaking from the knob. A quick tightening of the stem and nut underneath that knob fixes the leak 99.9% of the time.