Another question to Harvey. Back many years ago, we used to R&R the spring on MOPAR Torqueflight automatic transmissions, stretching it a bit while it was out. Effects didn't last too long, but it did work to stiffen up the shifts for a while.
So, using that principle, and what I think you're saying above, all that would be needed is the same size spring, but with a bit more compression strength...did I get it, or did I miss the boat yet again?