I use 'em, Monkeyman. I can't push them over 4.1 or 4.2v (6.5 to 7w). I also have ic16's (with a crap-ton more headed my way). I love them but the flavor is a bit muted. 16's can be pushed further than 30's for some reason. Rebuilding may help but, like you, I haven't rebuilt them yet.