I got jrawk's 176 opto Fuse in the mail yesterday and got out and tested it today. I threw it around in a feild about 10 times and then played two 9-hole rounds with it and a putter. I used it for every shot that wasn't a putt. I then hit the practice field with it again after for further testing.
The Fuse seems to hold any line you put it on with out any fade. I'm not saying it goes straight on the line you throw it, it'll actually hold a curve all the way to the ground.This can make it an unforgiving disc, but if you remember to finesse it, you can use this to your advantage. It really excels at holding anhyzers compared to something like a Buzzz.
As far as hyzer flipping, this 176 opto won't flip from extreme hyzers. If you put too much hyzer it lock into that line and hold it the whole flight. However, if you put the slightest hyzer on it, it'll flip up and hold some of the straightest, glidiest, most beautiful flights I've ever seen.
I'm a Buzzz man and the Fuse at this point isn't going to kick my main Buzzz out of the bag. However, I think it may be kicking my light weight/ beat Buzzz out of the bag. It holds anhyzers much better than a Buzzz and the lack of any fade when hyzer flipping it will make it indispensable when throwing on dead straight tunnels.
Try the GL...Its a little less stable and a little more Buzzz-like. From one Buzzz man to another, I've never found a better touch/understable compliment to the Buzzz (including beat/x/d buzzzes).