I tried so of those mods. I took out the inner riser and cut it down, but I cannot get it back in. Right now, I am running it without a riser. That's not working so well. LOL.
I may try the recirc mod if I can dig up a small powerhead.
Oh, I also have an oceanic 4 laying around. It's a total piece of crap, too. Any ideas with that?