I would not give you much chance of having decent dye stability with these dyes. The reason is that all modern color developers have a methyl group adjacent to one NH2 group to push the rings out of exact resonance due to the bulk of the methyl group. This adjust dye hue and also stabilzes the dye to fading influences. Couplers are designed for this "twisting action".

Also, the pAP dyes will very likely be very pH sensitive. This is due to the acid nature of the -OH group instead of a -NH2 group. Again, couplers were not designed to allow for this ionization.

Good luck guys. And Athril, lose the dust and lint!