I just did my first batch of film using semi-stand development techniques. First, it is AMAZING. Your negatives look like they are etched glass, not film. I'm definitely going to keep pursuing this technique. For those curious, I'm shooting 4x5 Ilford FP4+ @ ISO 64, then developing in PMK Pyro 1:1:175 for 1 hour, with 15 sec agitation every 15 mins. This question, then, is for those who have more experience with this. I found on a number of my negatives that I had some uneven underdeveloped spots near the corners of my film. Not every sheet was affected though. I developed ten sheets in a Yankee Agitank. When I first looked at the film, I saw the spots, and so I looked for a pattern to see if it was relative to the position in the rack. It did not appear to be the case, as on one side of the center post, the outermost few negatives had these spots, but on the other side, they did not. I doubt it is a film issue, as I believe all the sheets in the batch came from the same box. I know that this development technique sometimes has issues with uneven development, most likely to raise their head in sky areas or other continuous tone areas, but this isn't the case here (at least as far as sky areas are concerned). I'll post scans as soon as my negs are dry so you can see exactly what I'm talking about. In any case, any insights would be appreciated.