Hello Here is some results of my experiment. I'm starting from simple formula: Bath A: Sodium sulfite 60g Glycin 7g Water 1l Bath B (one shot): Potassium carbonate 10g Water 1l developing time 5+5min. very tiny image, loss more than 2 stops. so I was modify formula and add some amount of metol: Bath A: Sodium sulfite 60g Glycin 7g Metol 2g Water 1l pH 7.5(!) Bath B - same this variant work, but loss 1 stop and give me negatives with very low gamma (about 0.3). max density is low (zone 5 - 0.4, zone 8 - 0.75). this formula can't make density more than 1.6 over fog+base. next step - increase amount of metol: Bath A: Sodium sulfite 60g Glycin 7g Metol 7g Sodium carbonate 7g Water 1l pH 8 Bath B - same reason of adding 7g of sodium carbone is very low pH 7.2 without it. developing Ilford HP5+ 400@400 3+5min. negatives look very nice. max density limited to 1..1.1 over B+F (zones 11..12). grain is fine. but sharpness is open question. follow is scan 2400dpi without any processing (only adjust min/max/gray levels) and some crops what do you think about this?