@IanDaemon 1. I wanted them to match (couldn't find square HMDI readily)
2. The places I put them are actually round details. Apparently the paint I was using didn't particularly like rubbery material
see original

@edmaul69 Exceptional tips! Thank you. Yeah, I'm not a master of the dremel, as you can see. It was a learning process. And, you're right, there's loads more I want to do with this thing!