I used a dropaway operated by the cable slide, and I could not get it to clear the fletchings, so I switched to the down cable. That worked, but it changed the timing on the binary cam, so I removed it, bought a used Whammy in the AT classifieds, installed and tuned it in a very short period of time, and it works perfectly! Very easy to install and tune, with no fletching interference. It does make some noise, and I'm trying to figure out how to quiet it down a little.
This is a very nice piece of equipment, aside from the sound issue.
I guess I'm almost saying I would recommend this rest, if it can be quieted down.
PS- I may be off topic, but I thought there may be someone looking that might have a suggestion regarding Whammy sound.