I understood that, until the order was picked up for scheduling and assigned a VIN, it was no problem to add or remove any features (and I added a few of them including HO and the onboard scales), until I went to change the trim, at which point I was told I couldn't do that without risking the order being cancelled. I didn't understand that any of them affected my place in line but I was at the dealer first thing the day the order banks opened in October and still haven't been scheduled so for all I know I lost my place in line each time. ¯\_(ツ)_/¯