Quote Originally Posted by cao View Post
Something to consider as an alternative is having some lengths of PVC tubing to take up the slack at the top. An eBay seller shipped me a pen packed in a PVC tube once, and by nice coincidence, the tube closely matched the shaft diameter of my Paterson tanks, so I chopped it up into short spacers, and, voila, no more rising reels.

I wind up using 600ml for 120 film anyhow because I use XTol 1:2 with two rolls on a reel with a minimum of 100ml stock per roll. I still have a couple of rolls with a thin edge where the reel rode up the shaft prior to my using PVC spacers.
Thanks Cao.

I've just started testing with just spiral agitation and to abandon the inversion method altogether. I use PMk pyro and Pyrocat-HD; so far the results have been excellent and very consistant. Agitation is continuous for the first minute with 5 second spiral agitation every 30 seconds thereafter.