Hi, That sabertooth will not work properly using the sliders. If you were using it for one of the sticks it would work great. The easiest and most common thing to do is to just use sep. speed controls for the tracks, and then assign each slider for each track. Done....
And then if you want to assign a switch so you can then use a stick to drive/crawl with more control/accuracy then set up your radio like this:
https://www.youtube.com/watch?v=09fe49ply7o.
That is a great example of what I was talking about on that other thread the other day. Including how to mix the tracks to perform just like your sabertooth would, withouth having a sabertooth. That video is using a dx10 but the programming and system is identical to the dx18. The radios only look different. I have both and they are amazing... Anyway, if you still wanted to use the sabertooth, then I think assigning a switch for another flight mode then using one of the sticks to drive is your only option. & if you did that, then you would not need to perform all of the mixes shown in the video. But like I suggested, 2 sep speed controls for each track and boom! Your set!
I prefer to use the sliders when I drive/crawl any of my excavators. The main reason is because I sometimes operate the swing, boom, arm, and bucket when I am moving to get it in a better position to accommodate my driving. And it looks pretty cool when I do that too.. LOL