Not best, but optimum Transmission?

OK, I believe I'm following that. And I'm not laying the blame at anyone's feet here. At least not yet.

But this place is an automatic transmission specialists. I'm just a dude. I provided them with the flexplate that was made for an LA 360 externally balanced engine. If they open things up, and see a big weight on the torque converter, shouldn't they know the flexplate and the weight on the torque converter are not a match? Or that the flexplate being removed is symmetrical and the one going on is not? I would think they are the experts and would recognize an issue.

However, that aside, WHAT IS MY NEXT MOST LOGICAL MOVE HERE? REPLACE THE FLEXPLATE? OR HAVE THE WEIGHT PULLED OFF? OR OTHER?

Obviously the new flexplate is throwing off the balance. I'm not sure if it can return it to Summit Racing for a refund or not. Which leads me to think to pull off the weight on the TC (that's free sans the labor maybe). However, it also seems the TC with the weight on it is balanced. If the weight is now pulled off and the pacman flexplate is used, I don't know that it is guaranteed to be balanced. Seems like balance is more guaranteed if I exchange flexplates (if the one removed is symmetrical). I'm frustrated now, and appreciate your help guys!