I have 1 of each piece (A/B/C/D) and had extras of A and C. Upon exchanging the hat, I lost all my pieces. Not expecting any refund but would be good to let other players know about this since they might choose to sell the remaining pieces or hold on to a huge amount and may end up losing it all
Was about to make a thread as well, i took an SS of it in action: hopefully a gm will be able to iron it out before the event is over, as it can be pretty discouraging to lose all of them if you hoarded a lot.
Okay, I'm really sorry. For some reason I didn't read your post properly and I thought the pieces were untradeable. Agree with you!