Actually, if there's enough room, I wonder if it might just be a good "after-market mod."
Shouldn't be to bad to have a template that can be created for drilling, then just adding the button and the wiring.
(Assuming that the cable has all 9 wires)
I can even imagine some people offering the mod as a service for a reasonable price.
Heck, maybe Amigakit could even offer it as an "option."
Would cost more than if it were produced that way, but who knows?
It's a bit spendy for me (notoriously cheap-skate here), but I'm considering it...
I do love a good arcade stick.. Never got the hang of joypads..
I actually made my own arcade stick back in the day (only 1 button tho, it was for my C64, although I put in a passthru 9-pin for dongles) and it was my favorite stick..
desiv
