Re: Slider shoe. Sorry can't attach photo, b/c I'm out of town for the summer. It's a small tab on the bottom of the engine that rides the middle rail for power. It is sort of springy to put pressure on the rail. If the pressure is not great enough, is loses contact and the engine gets no power. When the engine is moved manually or if it blasted through the dead zone and power is restored, the e unit then moves to the neutral position. Annoying. I read somewhere that if this happens, just spread the shoe away from the body a bit (pull on the end of the tab). Bingo - the little engine keeps on going!
Hope this helps.
Michael
