New to DIY

Hello Im new to the DIY forum but have been working and building with tube circuits for quite a while and have been thinking about one of Nelsons Pass's amps.
Have any of you guys did the mod to the Harman Kardon Citation 12 ? I 'd like to check that out, looks like a really neat re do of the
Citation, any unloved Citation 12's out there ??? I think Im settling on one of the Aleph designs for my first attempt at building a SS amp. is there a favorite Aleph amp model ? Some of the work IM seeing on this site and is amazing. are there any recommended circuit boards for these designs ? any leads or ideas are welcome.
e mail any time