Originally Posted by Betowess
Cool music, DC! Is the wood there just to help direct the bit? And did you just hand hold the wood deal, or ever clamp it?
I placed music in there because I forgot to mute the camera, and honestly, did not think our comments would help in any way. The board that you see with the holes is backed up on the other side of the glass with another board. I believe the board does keep the hole repeatable and assist in keeping the lubricant/coolant in the cut, the board on the other side keeps the glass from cracking and/or the hole from "poking" through prematurely. The other boards you see being used were just my idea for spacers to locate the holes. I did learn from drilling my 110, when using a deep substrate bed to make sure the bulkhead is located at least 4 inches from the bottom. I wanted the return as close to the top as possible so the diffuser can be pointed to the surface aiding surface turbulence. Since this tank will have Discus in it I need as much gas exchange that can be mustered to keep the O2 levels up. I found on my 55 that having a closed filtration system coupled with the sliding glass tops was not conducive to a good gas exchange. I believe mounting the return closer to the surface will help, hopefully. I believe RMC does use clamps, but only on smaller tanks. We did not use any clamps on my 37, 55, or 46.......DC