Try not to use turns in the lifthills of B&M-coasters. That's not realistic. I think your lifthill is also to high. This results in a too high speed for an inverted. Especially in the loopings. It would be nice if the second lifthill, before entering the station isn't necessary asswell.
Goodluck and show us the progress!!
I hope Frontier will look at the supportsstructures. They need to do some finetuning asswell...