Do you need to buy Paizo's Pawns products or other specially-designed pawns on very thick jigsaw-puzzle-lock stock? Or can you print out anything yourself on a heavy (like, 200 or 300 gsm) card stock?

Basically, how thick does the printout need to be to stay stable and upright in a Pawns Base?

I've been intermittently trying to connect to pathfinder.social for the past few days (since Sunday 09 July, I think) and I've been unable to connect. Was pathfinder.social offline or was I running into some kind of issue along the way?