Thanks for the help and feedback. This is my first RTW trip, but I'm really getting into it.

In order to have a plan in case SVX service to LHR on OW no longer exists by the time I take my trip, I came up with another version. I think I like it better, but wonder if it's allowable. Particularly, I'm wondering if I got the 2x intercontinental arrival into Europe rule correct on the transit through LHR between Tanzania and Hong Kong.

In Moscow, I would fly into one airport and out the other, thus the SVO/DME. Is that allowable under the xONEx fare rules?

PER-CNS//
PPT-IPC-SCL-LIM-GRU-BCN-CAI-BUD-SVO/DME-MAD-JNB-MRU//
DAR-(LHR)-HKG-CGK-NRT-PEK-SYD

Thanks again to all for the much needed and useful advice!