hi I am no a pro in the zone systeme but can say one thing pulling also helps to reduce grain formations to some extent. If you have no reservations regarding shutter speeds to be used, u can pulll Tmax100 to 25 asa and get really well detailed neg evevn of a little comtrasty situation. I have been doing tist for quite some time now developer= D76 1:3 at 24degrees, for 5 minutes actually the pulling and pushing timings could be calculated to so extent by adding or reducing the original timings by 30% per stop(posted 8716 days ago)Thats what I know it might not be THE WAY to do it;) thanks shreepad