Use an 4mm end cutter to cut the smaller internal holes
Use an 8mm end cutter to cut the remaining cuts
Bevel the outside of the sled with a 12mm corner cutter
The ring mounts are positioned with M12 bolts then screwed in place
Remove the plastic plate from the base of the router.
Using five M4 x 15mm hex head bolts with flat and spring washers, attach the router to the MDF
Attach the vacuum raiser and file/sand to fit your vacuum hose