Removing the grills is super simple. Getting them out intact is almost impossible… but if you’re not worried about preserving them they’ll likely crumble out from the frame as you start removing. They’re usually nailed in a few spots, so look for those.
Thanks for the kind words! Amp is Sophia Electric 300b SET, somehow forgot to add it. The Black Ice Tube DAC sounds good with upgraded 12AX7s (Bugle Boys), but I'm not very stoked on the functionality. The wi-fi connection for AirPlay is very buggy. Works well for movies through the Apple TV though.
Audio rack and the record holders were designed and built by me. Couldn't bare all the cheap-looking or outrageously expensive furniture out there, so had to make something myself! :)