Nubbb: I answered this subject on another thread but don't mind publishing my answer here as well.

Most have installed their own and maybe a friend's; whereas, we have installed hundreds for our customers. The tuning issue is usually relevant moreso to the arrow spine, cam timing, and shooter form. We have found that shooter form is much more forgiven by a good drop away rest when compared to a standard TM style rest.

One thing, on the MZE we try to do is keep the "overdraw" concept to a minimum. This is done to effect an arrow launch closer to the throat of the grip and to keep, in some cases, the cable(s) from hitting the hook. We have most often found that, in keeping with the above set of self-imposed standards, the mounting hole is dictated and not much of a choice. Yes, in some cases, you can choose another hole; but, keeping the hook closest to the riser has always worked better for us.

I have the equipment to do exact testing of "time" on the rest; but, have not yet seen the need to analyze this subject. We have not seen the need to keep the arrow on the rest any longer than necessary. In extending the time on the rest, it theoretically would lead to the type of launch mechanism that we have with a TM style rest.

This is not totally scientific but is very objective based on our observations. Hope it helps.