a9bf63cd_scoop_on__Mantis_ComposT_Twin___Content
[Rating] Positive [Author] Campfiredan Alachua, FL (Zone 8b) (8 reviews) January 4, 2009 [Content] 
I had the older big single bin tumbler back in the 80s and it worked great. But the two bin drum, though the concept sounds good, doesn't do the job quite as well. The bins are a bit too small to heat up right most of the time. And, when one is full and getting a bit moist and you are filling the other it gets hard to turn the drums as the combined weight is pretty hefty. If I were to do it over again, and I thought I needed two bins, I buy two separate big drum bins instead. On the other hand the big diameter bin drum, if I recall, had less clearance between the ground and the drum bottom. But even with more clearance on this smaller diameter one my large wheel barrel and garden cart don't fit under the cross bar. I had to add 4 pieces of galvanized conduit between the top assembly and bottom assembly to raise the whole thing about 6 inches. That works quite well for me but for a shorter person having the drum six inches higher would make the loading door too high. So the tumbler appears to be designed well to fit as many body heights as possible. But be sure your wheel barrel fits under it or get a smaller garden wagon to unload. Anyhow, even though I'm not supremely pleased with its composting ability and I had to alter the height I make VERY good use of it as a potting soil mixer so I claim to be a happy camper and give it a positive review.
The scoop on 'Mantis ComposT-Twin'