Rough mounting showed the scale should be spaced out 3mm from the table to match the head below, so I made end brackets that act as spacers, end caps and cover supports. 

Parts are mounted with 5mm screws that came with the scales. The cover is attached with 3mm screws from my electronics stuff. The top ones stand slightly proud but are so near the end of the table that I doubt they will hit anything. If they do, I can find some countersink ones.

The scales come with only one set of yellow dust covers but with slots for two so I bought 3m of the stuff on aliexpress and doubled them up. I think it is pretty well protected from flying debris. Some tape along the line between the table and the cover would be a good idea to keep out any fluids, but without a drip tray I'm not going to flood coolant any time soon.