I have 3 Lionchief engines. A Milwaukee Road 810 steam engine, another steam engine, Daylight 1727, and UP Diesel. Neither steam engine will go through a Lionel O42 switch without stopping. The UP Diesel goes just fine, no problems. Looking at all 3 engines the only thing I see different is the spacing of the pick-up rollers. The steam engines rolls at closer apart than the Diesel. Is there any way to help correct this problem? Any help out there would be very thankful.