I also re-worked some of my Life Like locos where I removed the inside plastic bushing from the drive worm cause the locos were making noise this eliminated the noise and now they run smooth and quiet. I read in an article somewhere if you remove this piece you reduce vibration and that quiets the drive worm.
LOL, makes ya feel good to say things like, "Glad you liked the article. I wrote it!" Thats awesome Ron. I'm glad we have innovative people like you and others making this hobby or scale rather, exciting!