Having owned over 30 or so Mega Drives I wondered why I didn't have a better one. So I bought a good condition Model 1, did the usual 50/60hz & language switch mods, added a 10mhz crystal wired to a switch and also added a halt switch. I'd done this before but without the halt switch because I thought I wouldn't need it. It really helps you see the difference in slowdown though.

I even replaced all the capacitors on this one.

...and for a finishing touch of overkill, I added a heatsink.

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