Processing guidelines for Plus-X and Tri-X reversal in Microdol-X 1:3

I've shot some Tri-X (200/160) and Plus-X (100/80 iso) super 8 film which I want to process in 1:3 diluted Microdol-X. I am forgoing the reversal route and going to end up with negatives. Does anyone have a time suggestion for these kinds of film in MDX? Any insight or guidelines to this process will be helpful. Thanks

-R

PX in MDX 1:3 for 8 minutes gives good exposure

Process ran, 8 minutes in MDX 1:3 renders good looking negs on PX reversal...next experiment is TX in MDX