So I'm flying round-trip IAH-SCL later this month using the dreaded Copa option through PTY (IAH-PTY-SCL on April 24, SCL-PTY-IAH April 27). Flight booked through United as an M, IAH-PTY-IAH legs instant upgraded. Debating whether to use GPUs on the PTY-SCL-PTY legs (I'm out of RPUs). Yes I know using GPUs on 737 flights may seem like a waste to some but I don't currently have a strong need for the GPUs otherwise and by the time I might, I'll have 6 more. And the flights are just long enough (6+ hours each way) to probably justify it. The real question though is whether to try to hold out for CPUs. Anyone have experience with CPUs on PTY-SCL-PTY? Thanks!