RE: any of you bowtech guys have a Zero Effect on your bow?
Champ,
Just figured I'd answer your PM here, in case others have questions as well.
Matt's right... our newer bows just aren't as conducive to using the ZE. On the Black Ice, most people had to cross their cables above the guard to get them to work. I haven't had any troubles on my Ally; in fact, it's one of the reasons I love that rig because of the ability to use my ZE on it. I've got one on my Constitution as well.
For all the rest, I've gone to using Limbdrivers for now. After the ATA show, Mr. Angeloni and I spoke several times on the phone putting our heads together about the next logical step in the evolution of the rest. Mark at Muzzy is right; Joe is (or has) developed one very similar to the Mathews model (in fact, I saw the prototype) which looks like it would work. Until the time it's released, the Limbdriver is the one of the best options on the bow you asked about, the Guardian.