Custom Sega Mega-tech cartridges project

My latest Dream-come-true is this project of filling the 8 Megatech cart slots with my favourite games! 

The author of the PCB design published his work at http://www.jammaplus.co.uk/forum/forum_posts.asp?TID=68259&PID=749574&title=custom-megatech-games-effort#749574