QuickFuel 880 Surging/Missing At Wide Open Throttle

Sounds like lowering the floats helped some. I would do it a bit more and evaluate your 2 symptom cases separately; it is just for analysis on which way to go BTW, not necessarily to leave the floats low. (Of course, of the lower floats causes another symptom set that is separate, ignore that for the moment if possible. Sometimes changing floats changes so much it is hard to tell where things are going.)