I don't know much about it, but have been playing with Rodinal (Adonal) a bit. Recently I tried semi-stand for about an hour with 3ml per 36exp roll (Tri-X 400) in a two roll stainless tank. That's 6ml + about 480ml water (I wanted 1:100, but decided on 3ml per roll instead). They came out too dense. It's been a long time since I've been in a darkroom, but I think they'll be printable, albeit with long exposures.

Yes, I know the comments I may get from this, and yes, I read the Massive Dev Chart. I'm just playing around and experimenting, so there is no loss. I did it on purpose; this is how I learn.