Do both work?
Yes, I think. when plugged in they hum and move when I push the refund switch in bottom corner but have been to busy fully drop in change to study if they operate the rack.
Thank You Moondaw, Mygoose,Slapshot42, Tkaz, and MaineT
Im going to research the the 7500 and see if they are available new somewhere. Maybe funtronics or there is always ebay