See link below for some pics of my ST120. The build was a lot of fun and was easy too. Since I'm not a Dynaco purest I made a few changes to suit my 'needs'. I hope my mods don't offend anyone:
Added a cover plate to hide the driver board.
Added a face plate for a more 'traditional' look.
Added four jacks on the top surface instead of using the front mounted octal sockets for bias power access points.
Input signal enters from the back and goes straight to the driver board using a fixed length of VH Audio Pulsar cable. (My favorite for DIY interconnects).
Moved the power switch to the front panel.
Transformer covers are nickel plated.
Anyway, my wiring may not be the neatest job I've seen on this forum but I'm confident it will provide years of reliable service. The amp powered up without issue. Followed the bias instructions. Ran it for a few hours in my 'workshop' system. Now its upstairs where it has displaced a McCormack DNA 0.5 Deluxe solid state amp. I can't believe that this ST120 has more 'balls' than the McCormack! Its heavier too! So far I like what I'm hearing. Will come back with more comments later.