What tends to happen to me a lot is that I end up in a sprint weekend and end up having to switch old power units in for practice and swapping back to new engines for qualifying, back to old for fp2, and then back for sprint and race and I just end up forgetting to switch back once we actually hit the races. It's very annoying because you can end up being stuck on old engines without even realizing pretty easily. This would be a lot easier if I could just designate all the switching ahead of time.