my epic controlled 2 board t21 with repasted heatsinks work really well.
My antminers that work well, work well. lol... but generally they are crap and you know that Phil!
yeah ant miners avalon and whatsminers all break more often then they should.
they are all price a bit more than they should be
they are overdriven just a bit
fans run at 100percent often
because they are pulling just a bit too much for the case they are in.