Pretty sure this was the place that used to sell some pressure switches and such to control an RH, similar to what you did. If correct, I would guess that is what the "727 to 518" topic would cover.
Didn't see anything that would control an RE, though.
I have seen where some used the GM 4L60E controller on the 46RE and said it worked well.
Seems like it would since they have the same functions, but just a different connector.
Love to see something on that. Not casting doubt, just never heard of it. That would be the first viable solution beyond running the OEM PCM as a TCM. Doesn't seem unreasonable to think they have some similarities, but I don't know enough about it to do anymore than guess.
Had a buddy that wanted to use a RE in a swap because it was shorter than an RH and moved the TC closer to the motor, making the rear driveshaft easier to fabricate. I spend a fair amount of time looking for a controller for him and came up with what-if's, maybe's and "I'm going to...", but never anything better than vaporware. Doesn't mean my Google-fu was strong enough to make it an impossibility, just sharing my experience.
