I'd be interested in cracking the formula, but just don't have the time right now. Any idea why all the different R-3000 type kits have dissappeared from the U.S. market? Is it a shipping issue or a market (i.e., digital) issue? I know that Freestyle still has a version of the R-3000 kit under their Arista brand, but they can't ship it. Tetenal's seems to be available in Europe, and I've also seen another European kit that involves buying an R-4 kit of a certain brand and combining it with their second developer for reversal processing. Of course none of it seems to be shippable to the U.S.