gjeffers...Do you use 6 volt? I can't remember. I know some people complain a little about 6 volt systems having a bit of the jitters. I have always used 4.8 volt for that reason. I'm not sure why that's the case but it seems to happen that way. That's why 4.8 is still used. Anyways, sounds like you are gonna try that. I'd be interested to hear if that helps.

And that is a cute granddaughter. My grandchildren are a little younger than that. Oldest is 6 and the youngest is 6 months.

Thanks
Barry