Joe, in addition to what Ken has told you above, you might want to check out Sprint's website for dev. times. I haven't used their dev., but isn't it pretty much like D76 1:1? From just glancing at their data, I think you could probably just use the times for Plus-X, and extrapolate these over to Tri-X at 200 EI. If it were me, I might just pull the film 10-20% off the regular times. Like I said, I haven't used this stuff, so if you're really unsure, why don't you just run a test roll, or at least a clip, before running it all at once.(posted 8600 days ago)