Unfortunately my drimaster 2 is now ready for the scrapheap, after only 18 months of use.... and I don't really clean masses of upholstery, so it has had relatively little use. Said it before and will say it again, a very expensive piece of cr*p in my opinion. I'll keep it in case I get a big commercial job to dual-tool on, but I know which tool I'll be using if a job like that comes up!
The biggest problem with the drimaster is the way it is made; its flimsy plastic means the vac slots pinch up together under the high vacuum of a truckmount, and the metal lips stay bent into that position. This causes 2 problems, firstly the air flow is choked which destroys cleaning performance and leaves loads of water behind. Secondly, the metal lips snag fabrics - I have had a few brown trouser moments on some suites, luckily been able to sort them
I have had thre d/m 1 frpm new about 6yrs now, never ,ever had a problem as for the metal ips been bent!!!!! cant see how unless mis used, and yes i use with a t.m
Geoff