I’ve had success on TMax400 with permanganate bleach using 1:6 Rodinal as first developer (15 min) and 1:6 HC-110 as second developer (15 min). For both developers, I use constant agitation for 1 min then agitate 10 s for every 30 s. @relistan used his densitometer and got Dmax = 2.95 and Dmin = 0.17. Perhaps you can try that if you have them.
Thanks man - might give that ago eventually. But Ive been trying out some other recipes and still have loads of chemicals left... so I figured Id use recipes that uses those