New enthusiast, and don't want to collect stamps in my old age. Have 125 feet of O-gauge going around living room and kitchen. Have Lionel CW-80 transformer and 18 gauge bus wire connected to track at 6-8 foot intervals with 18 gauge feeder wires. Runs ok but I have to raise throttle to 50-60 to get engine alone moving. Is this normal? Is 18 gauge too small for bus with this distance? Is transformer (came with starter set) too small? Have plans for second parallel track with switches when (if) I figure this stuff out. All other displays powered from a different source.