Which reminds me, I used to have a Mega-Tech board with ten or so carts. I sold the whole lot to user @mar.vetto like six years ago on the promise that he would dump two carts that were included, Fantasy Zone II and Target Earth. The latter had a crude black on white label. No idea if it was a hack or preproduction copy or something else entirely.
I think both games are still undumped.
Yeah man, I'm calling you out.
EDIT: I double checked and I believe the Fantasy Zone II in Mame is the System E game.