I'd heard of Borax, Sodium Carb and Sodium BiCarb being used for remjet removal and Kodak's alternative prewash is 58g carb and 19g bicarb. When conducting my own tests of chemical/agitation based removal I found the 15 min soak 'n shake with carb was by far the best, with the solution coming out very black.

I've had the slight setback of a leaking Jobo (and a poor, dripped on dog) but I'll carry on testing tonight and perhaps not be so bold as to assume I can omit an ingredient from a Kodak formula!