David,(posted 8334 days ago)I was having a real bad time with Tri-X (TX in 120) developed in PMK. I did a normal 20 minute wash then hung it in the negative drier and the film edges actually began touching. I didn't have this problem wiht HP5+. I speculated it might be related to the long wash. I then just air dried the TX next time out and there was minimal curling. If you are using a negative drier, you might consider just air drying and see if that helps.
John