To whoever has problem how to figure which mode you should go for Sabertooth motor controller

I was very confused about how to setup these switch on this controller and found this site pretty useful. Few clicks and you will find which setting you should go for.

http://dimensionengineering.com/datasheets/Sabertoothdipwizard/start.htm

thanks, Found that before

That looks like a big sabertooth esc, what is it for?

50V dual motor speed

50V dual motor speed controller