I've done a 135. As long as you don't cut into the seam holding the glass edges together, you should be good. Most of the holding power is in the seam, that's why some manufacturers can sell tanks with zero edge seams.
It's plywood, not mdf. The stand is very sturdy. It was previously finished in poly inside and out, but wife wanted it painted to match house trim. Its painted in Benjamin Moore Aura Swiss coffee i believe.
Matching stand and canopy for a 120 gallon tank
$100, but i'd rather trade for a pair of lamptree, sump, ato reservior, t5/led lighting or coral frags.
Stand largest dimensions: 50x27.5x36 (area of 48.75x26.75 for tank footprint)
Canopy largest dimensions: 52.25x26.5x11
The stand is a bit...
I found this article useful. I've used the prazi+copper quarantine successfully.
http://www.advancedaquarist.com/blog/quarantining-marine-fish-made-simple
Not sure what grit I had on the belt sander. It was very coarse. I laid the belt sander on its side on the garage floor. I supported the pane of glass on a piece of plywood with the edge I needed to grind down overlapping. I would then work the pane of glass back and forth along the belt sander...