Gents, I use ordinary rapid fix w/o hardener, usually 3'/75F, with continuous agitation. Then I give the film two minutes w/continuous agitation in the 2% sodium sulifte solution HCA, then a 20-minute wash.(posted 8614 days ago)No leftover dye. None. Not in Delta or T-Max. Nada.
The point is that both Ilford and Kodak recommend the use of an HCA, there's no need to fix forever, and there's no need to use special or hard-to-find products.