I recently ran some 35mm TechPan through Rodinal 1:100. I thought the film came out well. I'm attaching my developing notes and a neg scan showing the results.
Develop in Rodinal 1:100 (4ml in 400ml water). Temp 66.5F. Eight minutes total time; agitate 20 sec after pour-in, then on the minute (swirl, swirl, invert, swirl, swirl, invert, pour out). Developer came out dark grey.
Water stop bath 2X
Fix for 5 minutes in Kodak fixer at 64F (cold bathroom), drain, water rinse, then hypo clear 64F for 2 minutes, rinse several times.
Photo-Flo several minutes, hang, then wipe with damp Pec Pad in P-F
Base is totally clear. Negatives are well-developed, leader is quite black.