@Jan @Vitto I like where this is going and tried running the train simulator. Saw a few open sections. Made some cuts and inserted flex track to help the match up. There would be enough flex in the tracks when laying down to not need to do the flex. I think I got all the breaks fixed.
I thought the grades were not lining up very well and re-worked the long grade transition. I think this replaced section will operate better than having a switch on a grade. Installation would be a challenge. Just a suggestion. The grade is not more than 3% which should be fine. As drawn, this will be a fun build.