Scottmisfits
Rock Crawler
I haven't heard of anyone running 70/30. You may check the deadband setting on the sidewinders. Follow the video that I have linked in the first post and see if you get through everything. You shouldn't have to touch the EPA's.
70/30 is a racing thing where reverse isn't needed. It gives a little bit more control of throttle speeds. With crawlers we typically like the trucks feeling the same in reverse as we do in forward so we will use 50/50.