Just started processing my own negs last weekend. After much reading I made some BTZS-like tubes out of ABS, and used Xtol 1:1, 100 ml concentrate, 100 ml water w/ 8x10 HP5. I processed for 6'30" rolling tube 10 turns in one direction and then 10 turns in the other direction. Negs came out pretty good.

Now I've got more to process, but this time they need a N-1 and N-2 contraction. From what I've read, 15% less time/stop is a place to start when contracting dev. I don't want to be in the danger zone of 4 min. with the n-2 sheet, so I've been reading about changing dilutions w/ the Xtol as a means of keeping consistent times. What would you recommend as far as times go for HP5 souped in Xtol 1:2 or 1:3, at 68*F, with continuous agitation? Thanks!

-Josh