Another #zxspectrum rescued!
Upper RAM issue resolved, still needs a colour tune up but it works.
The edge connector needed scrubbing with a glass fibre pen (IPA was not enough on its own), so that the DivMMC would actually work (M1 line perfectly fine).
But it passes tests now 馃槑
(NB: yellow line is the monitor, not the Speccy)
All memory tests passing, yellow line is the monitor not the Spectrum.
DK'tronics keyboard enclosing a ZX Spectrum issue 2, connected to an out of focus TV monitor flatscreen with a yellow line fault (screen, not Spectrum).