I have a g2 and did a few mods and want to see what everyone thinks. On the inside of the skimmer the inlet from the pump is in the middle of the simmer body, so I put an coupler, small piece of pipe and an elbow to direct the water to the middle of the skimmer and downward to take advantage of the water in the lower half of the skimmer. It seems to reduce turbulence in the skimmer and drastically increase the the amount of bubbles in the skimmer. It seems like more skimmate is produced as well, but im not sure. I also drilled 2 small holes in the lid, as I noticed there wasnt any breather holes in it. I read somewhere on this site, that without somehow to release the pressure in the collection cup, pressure can build up and force the skimmate down, making it harder to get up and over the cup. These mods seem to really increase the efficiency of the skimmer, but I could be imagining things. I skimmed through this thread and did not see these mods mentioned, but I wasnt looking too hard. Let me know what you think. Mesh mod soon to come.