Thanks I’ll check out littlefuses offerings and see if anything fits the bill
btw I checked the voltage on the line going to the cradle on the T3A, it’s 4.5V so they’re likely doing it with some dedicated I/O to the MCU using a weak pullup to a 5V rail most likely, but funadamentally it’s the same as the shake line used on the Ksger, so you’d just make a jack on the station (away from the mains) and connect the shake line upto the jack and then from the jack to the cradle, then ensure your handle is earthed/grounded (you may have to solder or tap a fly lead onto it if it isn’t already and this should work fine.
One thing to consider, if the shake line is directly fed into the MCU (even via a resistor) your going to want to look over the schematics and the board for some sort of ESD protection, say for example you zapped the cradle somehow you could potentially fry the MCU… I’d be interested to go over the T3A board also (given how similar it is to the Ksger) and see if they’re using any such protection too… I doubt they are