I have a Lionel #2055 Hudson locomotive. It was given to me, brand new, by my grandfather in 1954. In recent years I had it refurbished and custom painted. It has sentimental value. It has traditionally rune around my Christmas tree every year...pulling my Polar Express cars. Last year...as it made its first lap around the tree...it froze. It continues to power on, but will not go forward or backward. I would like to get it repaired...or at least looked at. Can anyone recommend a Lionel repair service guy?