Hi Phil, well done! Amazing detail n'est-ce pas and a certain "glow" in the neg. The brownish tint is hardly noticeable using 1:1:100 dilution (my negs developed to this dilution do not show an obvious brown tint), perhaps even invisible to the naked eye. If you have a chance try the 2:2:100 (might I suggest 11 mins for N+1 using BTZS tubes) you should see a difference.