Buttoned up a few more things last night. We installed the front undertray and also a bar, as cone protection... when I hit the wall of cones at the last event we learned how unprotected the radiators are, and wanted to take some steps to protect them.
We also had some issues with our overflow tank splashing at the last autocross. When I hit the wall of cones, we saw coolant all over everything and initially thought I had broken the radiator, but later found out it was thankfully just the overflow tank splashing (it's amazing how much the bottle fills when the car gets up to temp - it started at the "low" line, and was well over the "full" line while autocrossing. However, we do have a lower PSI radiator cap due to our turbo coolant tank delete for the oil cooled turbo). In fact, you can see the remnants of the splashed coolant on the radiator fan...
We bought a square one and relocated it. The capacity is actually quite a bit more than the OEM one, and we can have it placed upright. Hopefully this will do the trick.