I agree with you 100% Alder, it makes no sense to say that you don't want RTTT because you want to be able to exercise your OTP rights when the current contract doesn't have any restriction on CRS waiting to process trip trades and make up.
If people are really hung up on OTP, then why not try to get contract language that prevents CRS from processing trip trades from 0700 until 1000 LBT? That's the window in the current contract that CRS can't assign trips to reserves and the time when current sick call trips drop into open time. The other 21 hours are open for RTTT.