Good Afternoon,
Ive used several dozen rolls of Fomapan 120. I process it in HC-110B for five minutes as my "normal" time, although I have done a roll or two in T-Max 1:7 also; if I recall correctly, the T-Max time I used was nine minutes. I haven't really had occasion to try any expansion or contraction, so I can't judge that.
I have found the "box speed" to be rather accurate with my equipment and technique. Mostly, I've used 6 x 7 format enlarged to no more than 11 x 14, so graininess is absolutely no problem. I'm fairly sure that Foma 200 can stand a lot more enlargement than that without any problems. Results with 5 x 7 should be terrific.
Konical