I`ve used Fein`s amidol several times and can say that BZT works in it reducing fog on some old papers. In addition I printed for two days without signs of decay(formula gives evident cold-tones on bromide papers and fat blacks), moreover, after 1 month of shelf life it worked(!!!) only with the loss of d-max. Also developer didn`t stained at all(I used Amidol from 70`th). Unfortunately I have very limited amount of amidol to work more intensive.
From my experience in some way similar results(cold-tone on bromide papers) from a range of non-amidol developers gives Maxim Muir dev-r.