Thanks for the suggestions, but I have tried working from the plate. I checked all my measurements twice before drilling but one of the holes is closer to the plate's central hole than I would like. Ce la vie
Not sure about your model but some routers have a plastic or bakelite face on the base that can be removed, this can be used as a template. I did this with a Dewalt DW625e.
Not sure about your model but some routers have a plastic or bakelite face on the base that can be removed, this can be used as a template. I did this with a Dewalt DW625e.
+1 to this - to ensure absolute accuracy (within minor tolerance) if your marking or drilling is a bit iffy, I would place the template over the perspex (or whatever) and use one of the hinge drill hole centre attachments - they spin and self centre, then you plunge it (keeping straight as you can helps) and it drills a small guide hole, which you can then deepen. Pretty much bang on everytime, regardless of grain, even knots in wood as it can't wander.
this is the fancy version, you can buy a cheaper version from screwfix for £12 which work great in my experience or even cheaper copies from ebay as you only need it to work once.
I am surprised the 177 doesn't have a removable tufnol/phenolic sheet on it's underside. I am pretty sure I have seen replacements on eBay. It's how I make my subbases.
Remove the plate. mark, dril and countersink the fixing holes.
refit the plate.
fit a v-groove cutter
fix the new subbase to the router, mark the centre using the v groove cutter
remove subbase and finish edges, centre hole etc