Just put some more 120 TriX thru pyrocat as an alternative to HP5. Rated at 200 (normal contrast lighting) and deved with normal agitation (60s initial then 10s every minute) for 13 mins in 1.5:1.5 pyrocat (a year old and perfect) and thought I would share my very subjective results: The film is much easier to get contrast from that HP5 in this developer. The stain in TriX is clearly more brown without any tinge of yellow green that HP5 has (not easy to see in isolation but blindingly obvious when side by side), which might have something to do with this. The grain is about the same (perhaps a touch finer with the TriX) as is acutance. The prints do seem to have a better range of greys and I did not have to fight to get the desired contrast and clean tonal seperation in the prints. HP5 plus is so much more 'stately home' and TriX, the 'street'. When the sun is not about HP5 can be a grey soup! All in all I am really pleased I tried the TriX. The negs printed themselves and the 'look' of the prints was fantastic. I am not especially used to TriX, but have used loads of HP5 plus. I know other users have struggled as I have to get snappy prints from the HP5 in pyrocat under dull conditions without insane dev times. I am changing to Tri X for my 120 work. The sun does not shine often enuff here to need Hp5 plus's lowish contrast! BTW the pyrocat is the phenidone version and is in mostly empty brown glass bottles, with a good seal. I made it in August last year and it has not changed at all as far as I can see.