The Zonovski variant AKA The Leningrad, a 48K ZX Spectrum clone from Russia

Hello to everyone and welcome to the basement. Early in 2018 I decided that I'd try to beef up my soldering skills with some DIY kits making a few different electronic devices like audio amps and POV (persistence of vision) devices. Around the middle of the year I was looking for something a little more challenging and found Sergei Zonov's LENINGRAD a ZX Spectrum clone in the form of a DIY computer kit. Soon enough I found out that these clone Spectrums were a huge part of the 8 bit computer scene in the