I have a very subtle but noticeable sprocket hole surge situation going on with some film I just ran. I've never had sprocket surge, ever. I had it with two batches, one in Rodinal, one in HC-110. My agitation has not changed at all. The surge is subtle, but enough that I need to figure out what happened. Two things changed, and I wanted to see about opinions if either would likely be the culprit. 1) and this is my suspicion, I just started using Heico Permawash a bit ago, b/c my shop was out of the usual...figured wash was wash. But I noticed heico is much slicker than my previous wash-aid (Ilford). Almost like it is soapy. I know photo-flo can coat reels and cause uneven development (not sure about sprocket surge though?), has anyone ever had a similar situation happen with permawash? That's my first intuition. 2) I used really really fresh fix (TF-4), and agitated pretty much continuously and vigorously (for 4min). I usually don't use such fresh fix, usually it has time to settle before use. Can fixer in anyway change a density in the film like this? Other than that, thoughts? Appreciate it.