Quote Originally Posted by biketrialsdave View Post
My latest thought is to bolt down a 20mm aluminium plate to the top of the steel raised area (shown in photo). I will then use the machine to skim the surface flat. Then I will use the machine to drill a grid of holes which I can then tap (maybe the router could do this??) for holding jigs and fixtures.
A plate with holes in should work well. But I don't think the WC spindles have enough torque to tap directly? However, you can try thread milling using a special cutter (~£40), plus your CAM will need to be capable of a spiral cut with user parameters on the pitch:

Forward to 12:23 to see thread being cut:
https://www.youtube.com/watch?v=a43S2y7Ccy8