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I have five in UP name with light bars and six in Amtrak with IM ball bearing wheel sets. The IMs are 100% metal that preclude me from using the bars since electrical contact is thru both of the stock wheels that has a plastic axle. Since I have only 22" radius I converted to the KD #26 longer shank. This prevents the diaphragms from rubbing together on the curves(less of a de-railment problem on 22") I also had to shave one rung off the dinner ladder since it was rubbing on a curved switch. I use two Walthers F40PHs Amtrak SeriesIV or either an Atlas Amtrak Dash 8-32BWH Series IV. The UP is a bit of a dilemma. I bot the Rivarossi Challenger to go with the UP cars since this excursion train still runs today but the traction tires would not stay on. ( See my Post"A Trainworld Return and Surprise). Until Lifelike's new E8/9 comes out later in December I will use their F3 A & B as a substitute which are fast units in UP road name. In a comparison test I ran the A-B pulling the Amtrak(IM wheels) and then the UP with stock wheels(lighs on and adjusted for the additional voltage draw) and my Amtrak(IM) was 14% faster. I enjoy the lights better than the 14% increase in speed(free rolling) but that's the learning experience. The instruction sheet that came with the cars recommended oiling the axles but now according to Walthers, that's wrong. Please share your operating experiences. Chuck locomotive3@prodigy.net
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