MDF and alu sandwich router

[Tom]

who did you get the bearings from on ebay ?

I got them from this chap. Is that you? :) They've not arrived yet, but i'm expecting them to be low-rent.

Some progress tonight - I got the M8 nuts fitted to the inside of the router base. I thought it would be a 30minute job....

Ho hum. 74 nuts and 2.5 hours later I've just finished!

Pics:
I counterbored the 8mm holes with a 12.5mm bit on the underside of the base.
Then pulled a nut into each counterbore using a screw. M8 nuts are ~14.5mm across the diagonal, so they're staying put.
Finished. Just need to put the underside skin on now.