it is only tmax that is not recommended for sheets,
if you can get ahold of tmax rs you will be OK with sheet films.
the RS version of TMAX developer is formulated to work,
the other version ( without the RS ) is not ... AND you can use
the tmax rs with roll film &c and it can be replenished if that is something
you like doing
good luck waiting for that lens !
I think i better go with something else rather than Tmax for sheets, there are many developers to choose, so i may go back to D-76 and give it a try for sheets, if no go then HC-110 is my new fav dev anyway.