Looks like an interesting project, Erik! First order of business after you complete it, linear power supply:
https://www.ebay.com/itm/150VA-DC24V-5A-Low-Noise-LPS-HI-END-Linear-Power-Supply-for-Audio-PSU/11299...
Have fun with it!
https://www.ebay.com/itm/150VA-DC24V-5A-Low-Noise-LPS-HI-END-Linear-Power-Supply-for-Audio-PSU/11299...
Have fun with it!