This sucks, I spent so much time working my way up the mountain averaging 10mph. I got within 5 miles from Summit and looked away for one second and when I looked back I had wheel slip and couldn't apply sand in time to stop the stall. Nothing in my power will get this train moving again. I was running sand on the lead truck most of the way up to address the slip, but didn't get full sand in time. I wonder if the 2 trailing units can be setup for distributed power before leaving the yard, but I don't know how to do that yet. Disappointing, but lesson-learned... Don't look away.