Ross turnouts are a perfect fit for tortoise turnout motors because you can energize the closure rails to prevent stalling of short locomotives. This gets a little wonky, but essentially what you want to do is turn the closure rail your locomotive is rolling on into a "ground" and the unused one (for the other direction) as a "hot" for the pickup roller. Using the Tortoise contacts, you run a feed from each closure rail to one of the two "common" relay points, then hook a hot feed to the one not being used; the ground to the one being used and vice-versa for the other closure rail. Ross has a diagram for "hot-railing" on their site. This is pretty much required for larger turnouts and I had to put one in for our #8 curved turnout as GP35's were stalling when running through at under 20 miles per hour. If you don't have a ground issue, the Ross hot-railing approach is the better option as it's simpler.
