Response to microdol 1:3+ 120 film= superfine grain??

I came back to the darkroom after 20 years and stupidly listened to someone in a photo store encouraging me to "go liquid" and did a bunch of rolls of tri-x 35 in Unitol which he was touting as the new big thing in fine grain developers. NOT as fine, and too contrasty. I'm going back to my old system, which is Tri-X shot @ 200, Microdol-X 1:3 for 13 min. (I use it at 70 degrees to cut down on the time). Yields rich negs somewhat on the thin/flat side but all that detail comes out with the right paper. A related question: do you mean 30 seconds of inversion per minute? I'm going back to medium format and used to have a problem sometimes with agitation density at the side edges (my system was invert twice, rotate/spin the solution 3x, twist 1/4 turn, for 10 sec./minute). Maybe I should just invert for 10 secs (& twist)? Thanks all.

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