The solution for processing TMAX in a drum processor with PMK pyro is to not
process this film in PMK in a drum. You will never getting proper staining
with this processing method with TMAX film.
This tip is one given by Phil Davis when using Darkroom Innovations drum
processors and I think it will apply to Jobo drums as well.
BTW, I have used PYRO with TMAX 100 on roll film only and had excellent
results, however the stain on the emulsion is not nearly what you would get
with films such as Verichrome, TRI-X or FP-4. Also I'm rating TMAX at about
80 in PMK. You may prefer to stick with TMAX-RS or Xtol when its all said
and done, although you will benefit some from the PMK staining effect but as
I said not as much with other films.
Hope this helps,
Don