I developed two 120 TriX films using the Paterson plastic reels (twist to wind film) and the films had what looked like buckling marks.

Is this typical?

Or did I do something wrong? Twist too hard to wind on the film?

I thought I was gentle, although I had to fight with one film to get it on the reel.

No issues with a third film that I developed using the standard steel reel.

...Vick