Nice piece of work there and some of these cabinets look great!
I have a fairly comprehensive collection of retro machines including my first ever vic 20 at the time an impressive upgrade to the ping pong we had. It spans from 1st to 5th generation.
I have all the commodores, from the 3k vic 20 through to the Amiga cd32. Yup I'm missing the pet.
Atari wood grain old skool pac man

Zx spectrum from the original through to the +3 disc
Amstrad cpc which came with its own green monitor, you think grainy colour lines is bad? Try green grainy lines

sega, Nintendo, etc. etc.
Of course that was the turning point battle of the consoles, Nintendo and sega so fixated on beating each other, they didn't see Sony coming!!!
The capacitors replaced in most as to preserve original is difficult given age...even the dreaded on board battery in the Amiga can absolutely kill a motherboard even packed away nicely in a loft!!
Wife hates the size of this collection, plus all the games to boot!! But when friends call in and we boot one up for nostalgia it's well worth it as they search through tapes going " I had this! Pop this on" only to realise as a kid it looked awesome cutting edge....but manic miner ain't all that these days!