Yeah no numbers and no images on that part of the roll. The film was neopan 400 and I developed it for 11 minutes in rodinal 1:50, the agitation I used was to use the spinner which was recommended to me by the previous owner of the tank. I did 30 seconds constant agitation with inversions at the start and then every minute for 10 seconds I used the spinner. I guess I must have been a bit conservative with the spinning because I have read that too much agitation can cause quite a lot of grain when using rodinal.
Anyway I developed a different roll of tri-x and that turned out great probably because I ditched the spinning method and did normal tank inversions instead. So I think problem solved! The only other issue I have noticed is that on some of the rolls there are dark blotches on the film. I guess these are drying marks?