I use Rodinal at 1:25 or 1:50 with a Jobo CPE2 rotating tank. I use a 10ml syringe to draw up the Rodinal from the stock bottle. If I need to make 1:25 dilution, I squirt 10ml into a measuring cylinder containing 250ml of water which gives me 260ml toatal volume - perfect for the Jobo 1520 tank (if rotation is used but not for agitation which requires a larger volume).
I have used Rodinal with Delta 400, Tri X ISO 400, TMax 400, PanF and Acros ISO 100. As Simon mentioned, Delta 400 looks a bit grainy. TriX and Acros come out nice.
At 20C, using rotation:
Delta 400, 1:25 dilution : 8 mins
TriX ISO 400, 1:25: 6min 15sec
TMax ISO 400, 1:25: 5min 30sec
PanF ISO 50, 1:25: 10 mins
Acros ISO 100, 1:50: 12mins
For hand agitation add 10-15% to these times.
Al the best
--
Monz