I have the above locomotive, I need to change all of the tires on the front and rear sets of drivers. Is there anything I should be aware of before I tackle it? How hard is it to change these out? I'm really nervous about this as I don't want to mess something up and have it become a Shelf Queen as I'm not really hankering to send it back to Lionel for this task. This is the TMCC version and I really like it, I may have it converted over to Legacy in the near future. Thanks for your help it will truly be appreciated. I read the little book that came with it but it didn't make me feel to good about having to change them out but it has to be done.