I was wondering how the mods you did on your ASM g4x is going. What did you use to drill the holes said:
The mods are doing well. It seems to be skimming away nicely, although, I have seen a decrease in skimmate production, but I assume that to be a good thing as it means that my water is cleaner than before. With only 4 fish in a 120, there isn't that much waste, plus I only feed every other day.
I used a 1" (I think) hole saw to drill the body. It was very easy. I bought the uniseals from ASMskimmer.com, but you can also get them from:
http://www.aussieglobe.com/uniseal1.htm
I haven't noticed any detrius collecting inside the skimmer, but I have heard that it can happen. If I see some, I'll siphon it out during the next water change.
I never ran the skimmer w/o the mods, I figured that since I was going to do the mods eventually, I might as well do it from the get-go.
Hope this helps, let me know if you need anymore info.
Chris