Thanks I am happy you like it!
I made it big because I like sturdy / heavy feeling on my lap and, of course, for future change / implementations like this one
Main use was for all the Street Fighter flavours and Neo Geo stuff but now I feel like it is the best way to go for pre-analog games
I also found this kind of toy, quite interesting:
http://www.tototek.com/store/index.php?main_page=product_info&cPath=23&products_id=51I think I need to build some kind of little pcb where I connect all the buttons and then, with a switch, have an internal selector between different "out" connections (for pc engine and Neo Geo, basically: pc and usb consoles are already fine)