I took the plunge and bought a 3006 expert drum to process 5x7 negs on my Unicolor roller base. Most expensive piece of plastic I ever purchased! I had no problem loading the film and even made a very effective fluid reservoir to enable me to drain chemicals directly into the drum while it is rotating. At first, I thought the results were great, but then after further inspection, discovered small triangular shaped areas about the size of my thumbnail and located about 3/4" from the shorter edge of the film that were under-developed. Thinking that the problem might be related to differences in rotational range, I intentionally ran a batch in which I lifted the drum off the base for half a second to "advance" the orientation of the drum with each cycle. Same problem. So, has anyone had a similar experience and more importantly has anyone come up with a solution to the problem?
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