Búa gõ phím đen Roland PA-48 S

We got a Roland HP-245 piano from a friend but some of the keys didn't work. It's hard to get replacement hammers these days, and they're expensive. Thankfully @Geklatscht created a model for the hammers for the white keys. But what about the black keys?

Here is my solution, which I printed in PETG. Some of the walls are very thin, because it is a pretty tight fit. Print with supports where the counterweight goes (you'll have to rescue them from the broken hammers). Glue the two halves together, and now you have a replacement hammer!

Apparently, this should also work for Roland models RD-500, RD-600, A-90, HP145, KR370, KR570, XV88, FP-1, FP-8, FP-9 and more.