Does anyone know the exact M1-M4 measurements that work on it? Currently, my measurements are as follows:

M1 (front cross bar length) 40"
M2 (top of windshield to front crossbar) 11"
M3 (back cross bar length) 39"
M4 (cross bar spread from front to back) 19"

My M2 measurement is a little far - but if you move it up closer to the windshield, the antenna can't go all the way up, or you have to put it down all the time to avoid it banging against the front crossbar.

Also, my driver side door sometimes makes contact with the Q-clip, even though it's as tight as it can get.

I tried searching this site, but couldn't find anything really useful.

Thanks,
Mike