i finaly instaled one of my 2 multi jamma today.
more info on the multi jamma here:
http://www.multigame.com/jamma.html.
i decide to install it in my double dragon cab, with 6 pcb.
"multi jamma can power up to 8 games"
first strip the all cab:
a little cleaning, and then add the 6 pcb:
double dragon
shinobi
golden axe
golden axe II
altered beast
renegade
rewire everything
due to the fact the multi jamma run more than 2 pcb, i added another more powerfull power supply.
what a mess
finally add the "select game" button...
here few games runing...
i have another multi jamma with 6 extentions, will probabnly go in my tetris cab ...