RE: New CMP 50-sized Corsair
Zeno,
One thing I had did in the past with a problem like yours is put some tape on one end of the mount blocking the holes and fill the holes with epoxy before drilling new holes. Maybe that won't do much but it's an idea. If you have to tap new holes in the mount, might be a good idea to use nylon nuts also. I just tapped my mounts and that worked good for me, but then again, I didn't have to drill more holes.
Larry