I have used the F60, and still have it. If it hasn't been used in a long time, the focusing mechanism may be stuck due to dried up grease. Check the mirror to see if it is in good shape. Make sure you get a standard 39mm mount lens, because you screw the lens directly into the enlarger, instead of into a separate lens board.

There is a different condenser and neg carrier for medium format that can be switched out.