I've got three 4-8-4's, one-2-8-0,one- 0-8-0, and a 2-6-2. they all have loose wheels on them and the axels are made of plastic. I like know if anyone knows how the fix this problem. the wheel has a stub axel on it and it fix in to the plastic axel. I've try super glue and with no luck. i hate to have to srcap these locos. thanks Henry Jones