I just booked a CO codeshare on UA metal for SAN-SFO about 36 hours ago and now realize that I need to get to my destination sooner. I know I'm past the 24 hr free rebooking window so I'm looking at standby options. Is there anything different about standby since I'm booked as a CO codeshare or will I just be charged the usual $50 fee as a non-1K?