We have a 58mm and a 32mm set for the badge maker. How do you switch between the sets?
Hey Tim, did this end up getting sorted out?
No I have had no response about how to switch the sets out.
I thought Nog had a look at it with you during the working bee. And it proved to be tricky thing. So no definitive answer yet.
I just spoke with a lovely guy in Sydney who supplies badge making stuff and he’s given me some idea of what to do. I’ll try it out when I’m in next, probably Sunday afternoon. 
Resolution from Alew W. discord post 09/10/2020 in Craftpunk channel -
“Had a quick play with the button maker. To change the dies you just pull them apart. There’s magnets that hold everything together.
There’s a small notch and pin to ensure the top die is seated right. Bottom dies match A to position A, die B to position B. Little vertical tabs located towards the centre.”
Thanks Alex!