I don't like the taste of t-grain much. If I had my choice I'd do this on TX400, but now that they only make it in miniature formats... :-)
Jaybob, I appreciate the images---those look pretty darn good, and it makes me want to revisit stand dilution with HC-110. (I tried it once with TX and the results were interesting, but technically far inferior to a conventional push; there are so many variables in these things, though.) I'm curious: What were the problems with the shots that didn't work so well? Empty shadows, blown highlights, both?
My big concern would be not enough highlight compensation, I guess; the boomerang curve of TXP suggests that pulling extra information out of the shadows might end up overdeveloping the highlights. Which does suggest two baths or stand development, doesn't it? Maybe I'll do some experiments tonight.