the IIfx was the first mac i owned, moving on from the IIgs,
that's when i got to try out my 3D debut with raytracer and after that infini-D, the good old days, it quit working and i moved on to a performa 630.
the second mod was to remove the RF modulator and hooked it bypassing the tuner on the TV for better picture, and i could then also simulate different monitor colors, amber (yellow), green, black on white and reverse.
i also ended up getting a 16K expansion.
that's the one i learned my...
yeah the keyboard of the ZX81 was the first thing to go, i replaced it with a keyboard of a mainframe workstation where i re-wired the individual keys,
then built a wooden enclosure for the keyboard where the whole ZX81 board fitted under, like a VIC-20 / Comodore 64 type.
i might still have...
that's how i got hooked, ZX81 with 1k memory, (original from Timex 1000)
as for choice, me i would take the IIgs, never had or touched a plus went from the IIgs to IIfx
the ribs that go along the edge are a bit too thick and need to be removed to fit inside the battery housing, but otherwise it works fine, i used one of those for my 5126