I have been running my fans at about 75% each without adverse effects. I also run my prints a little slower than normal, usually 50mm/s max speed, 30 more ideally.
The fans on the DC will indeed hit the bed fingers on the right side of the printer, as can the E1 head on the front left. To solve this problem, I developed and alternative bed corner design that needs no fingers, but instead squeezes the glass on all sides to hold it tight in place. See the Corner Squeezer Bracket STL attached. These require 4 M3 x 14 screws and 4x M3 brass heat inserts. I have been running this full time for about 2 months without any issues.
I hope this is helpful!
150121CornerSqueezerBracket3.stl (74.9 KB)