I have two 'Smooth Like Butta' PSU boards that I no longer require. They are 'as new' and have not been worked on at all.
They are Cap multipliers with an onboard active rectifier. I purchased these via the Group Buy on DIY Audio, where you can see lots of detailed information;
https://www.diyaudio.com/forums/group-b ... ly-gb.html
The boards are 2mm thick with 2oz copper and currently sell for $22.50ea, I'm asking £10ea plus shipping and paypal fees at cost.
FS: 'Smooth Like Butta' PSU boards
#1 FS: 'Smooth Like Butta' PSU boards
Sorry, I couldn't resist!