kevin, that's a very heavy router, I think--compared to my Ryobi anyway. Are you planning on using an insert? I would consider an aluminum insert. As for the mdf, it is known to sag over time if not properly supported, so, the thicker the better, I think. I would think at least one inch or maybe 2 3/4 inch glued together. Unless of course, it has good support under it. Sorry for not being much more help.
Hopefully, one of the more experienced members will come along and give you more helpful advice.
good luck, Frank
Hopefully, one of the more experienced members will come along and give you more helpful advice.
good luck, Frank