I have the 500r on my 11 bin rack and have not had an issue for 3 years now.
I do have a herpstat as well for my incubator but the rack has been fine for years.
I'm using 11" flexwatt and it's back heat, so I just crank up the 500r to max and it runs the flexwatt at about 102 degrees. But because it's back heat the back side of the tubs only get to 94 degrees max.
I don't recommend them at all but mine has not failed me so far, but like I said I do have a Herpstat as a back up and wil swap it out at the first sign of malfunction. Why fix what ain't broke??
Gavin
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