I have a home-made CNC router, that I made for cutting balsa, plywood, Fr4, for R/C airplanes - works fine for these.
My spindle is a Dremel-type rotary tool.

I tried milling a pc board, using a 60° cutter.
This also works, but my setup is not accurate enough to make very fine traces, so I want to upgrade my machine..

I bought a 3/8x8x8" aluminum plate, mounted it on the MDF table, and now want to machine the surface to be flat.

I have ordered 2-flute 1/8" carbide end mills, and would like some guidance as to cutting parameters.

Thanks for any help,
Don