Been there, done that.
I too thought that I would continue using HC-110 with 5x4 Tri-X when I bought my (used) Jobo CPP-2 and 3010 drum. Thing is, I couldn't control it. HC-110 is just too active a developer for continuous agitation. Even at the lowest dilution (something beyond H) I still had 5 minute development times and Zone VIII densities at 1.3+.
So I gave up on it and switched to XTOL which I use at 1:3. Works beautifully and I wouldn't give you a dime for the difference in image quality. I compared Tri-X in HC-110H and XTOL 1:3 side-by-side at 12x enlargement and what differences there were were quite minor.
What made me switch wasn't image quality, but the ability to use pull development controls (N-1 developing), and an increase in real film speed of about 2/3 a stop. I could use Tri-X at box speed with XTOL! And I will give a dime for
that difference.
But give it a try if you want. But I'd just go ahead and skip testing "B" dilution and go straight to "H" because it's your best bet IMHO.
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