I suspect that the TD -103 formula in the Film Developing Cookbook is similar to TD-3. It's 5g sodium sulphite, 10g pyrocatechol (sol A) plus 150-200g sodium carbonate in sol B (potassium might be better). Dilute 1+9 and develop for 10-15 mins at 20c (rate TP at 32-50).I'm going to give it a go as I already have all the ingredients (the sulphite could be replaces with bisulpite btw).