I went on Amazon and bought these.
Yeaterday I used them for the first time. It was also the first time I ever routed any tremolo cavities.
What I learned most was…, I need to use a router with a larger baseplate. Next time instead of a little trim router I’ll use my skil router with the standard baseplate on the plunge base. It will be a better result but for the first time on a spare chunk of wood it’s not too bad.
@rathius wooden covers, often to match the top. That router is set on 4 out of 6. No idea what the actual speed is.
This one has an oak top, I laminated a piece of the oak to mahogany to make the cover. The mahogany is nice and stable so helps keep the oak from moving.
Call me a risk-averse wuss, but that'd be a case of fingers-a-bit-close-to-sharp-spinning-thing for my liking.
I'd be very wary of the cutter grabbing the wood and natural reaction being to try to grab and control it rather than letting the cutter do its thing, with consequences involving red liquid sprayed across the workshop.
Online guitar making courses – guitarmaking.co.uk
Doing it like I do makes you very aware of the cutter spinning away and you tend to be extra careful, I think sticking a bigger piece to the likes of a cavity cover would likely give you a false confidence aswell as the fact it'd have to be some sort of block due to the size.
The bigger dangers tend to be the ones you don't see.