Originally Posted by dmr
One of the true SMEs there pointed out that a formalin-based stabilizer should be used to keep the dyes of E6 from shifting over time, so that's what I'll plan to do.
That is correct. A stabilizer is needed for optimal colour permanence. As you have certainly read, this process can be implemented in the pre-bleach.
The best you can do being absolutely on the safe side is using the Fuji Hunt original 6-bath E6 process. They offer a kit for home developing.
Positive side-effect: This original E6 chemistry from the world leading photo chemistry manufacturer give you the optimal and perfect quality: Best colors, deepest blacks with highest Dmax, purest and most brilliant whites.
I've done side-by-side direct comparison tests of the Fuji Hunt kit with the Tetenal 3-bath kit (which is afaik the manufacturer of the Arista kit, too):
The Tetenal quality is very good.
But the Fuji Hunt kit quality surpasses that with a perfect quality.