bought a F7 B for just over 200…seller stated that the unit was missing an axle. Guess which one, yup the one that has the round magnet that controls the sound . I then bought a new mogel sound axle thinking it would work, guess what… Nope it did not work. My best bet at this point is to sulk for a week and ask someone to please check thier junk boxes, as I will pay top price for it.
You might want to check with Nicholas Smith Trains in Broomall, Pa. He has quite the assortment of used parts for sale at some of the local train shows.
#610-353-8585