I'm seeking opinion on my router mounts. At present, I have no way, at least none that I'm highly confident about, to make router mounts out of aluminum. Would MDF work for a while? If so, would a pair be strong enough to use to slowly cut some 3/4" aluminum when I get the machine running?

My current fallback for aluminum would be to use a woodworking circle cutter in my drill press on a pair of 3" wide pieces clamped side-by-side. I believe the cutter blade would be able to get through the aluminum. However, my concern with this would be the cutter blade catching on the center seam.

Thanks,
Roy