The 16x20 results are subjective, of course. So is "grain-free:" at what distance is a print grain-free? Twice its diagonal? Under a 4x loupe?(posted 8937 days ago)If you can, try and find out what the gamma of TP in TD-3 is from the Formulary before you use it: I've not found a "magic soup" for this film which delivers low gamma and high(er) speed.
In my experience, TP is what it is, like Popeye --- it'll never be a fast film, it'll never see N-1, and it's still not really grainy even if you soup it in Dektol.