Thanks Nathan, I have a JR X9303 and just realized it has sliders on both sides, lol.
But, I do not want to use my Heli radio to run construction equipment because the radio gets very dirty. It seems like it would be hard to find neutral using sliders and you might end up burning up a motor by leaving it on slightly for hours while digging? I did some searching and there are quite a few radios that have dual sliders. I just need to find the least expensive 2.4 ghz radio that has dual sliders. So far the least expensive one I have found is the Hitec Optic 6.
Another option would be a radio with two 3 position switches (X9303 has this) to run the tracks because they would run so slow that switching them on and off would probably be fine.