What's wild is after you money shifted and broke your car, I did the same thing! Luckily in my case nothing actually broke (see video below, you can see how I screwed up by going into 3rd instead of 5th).
But you are right the shifting on this swap absolutely sucks balls. What can be done to make it better do you think? I definitely see your point about the slop and my car has the same exact slop....