Xbox One Elite Controller Replacement Parts Help

Hey everyone, I just bought some replacement parts for the Xbox Elite Controller to install on my new One S controller. I had expected the left thumbstick base to interfere with LT, and sure enough, it is now activated 6-9%, depending on its movement. Unfortunately, this means I can’t play Forza at all, so I took that stick out for now. I’ve read suggestions on switching the sticks, but that only helped slightly. Any other ideas? I’ve heard taking out the trigger rumbles helps, but can’t see why this would make a difference. Any thoughts on taking out the rumbles? Does anyone think they help ingame?

Thanks so much for all your advice!