I have had troubles with the QAD getting clearance before, never had that issue with a Ripcord. QAD once told me on a specifically stubborn setup to try raising my nock point a 1/4"[&:]
I don't think so! I'm not changing the tune ona bow to over come the short comings of a rest. The last one I tried was a QAD LD. I still sell the QAD but I won't recommend them. Sometimes they do work great, but sometimes in my book isn't good enough.
I've had more than one issue with the QAD rests

Dan