I have been thinking about building or modding an arcade stick to use with PC-engine. The same stick should also work for Super Famicom. Those are the two systems it must be compatible with, various other systems would be a nice bonus.
I already have an extra Mad Katz Tournament Edition fightstick for PS3 gathering dust, the project should be based around that. I have 3 main concerns: lag, compatibility and price.
The most obvious solution for me would be a padhack based around PS1 controller and using various adapters from Tototek. I have understood that those adapters add next to no lag. They have a wide selection of them each priced at $20, so for $40 (+shipping) I could build a stick with support for PSX, PCE and SFC. And there would be an option to add more adapters in the future, like MD and Saturn. Button mappings seem sensible too. Are there any reasons why this might not be a good idea?
The other option would be to use one of those multi-PCBs, but I have some concerns about the lag and compatibility. Since I really only need PCE and SFC the padhack seems simpler.