Your itinerary has 18 flight segments (assuming four in Europe). So you still have two to go
You are using only two flight segments in Africa
If your initial 'positioning award flight' allows it then use it to arrive in JNB and to fly on to DUR
Start your AONEWC4 in DUR (anyone know a TA there?)
First segments will be DUR-CPT(stopover)-LHR
i.e just one segment in Africa
Use the remaining three allowed at the end of the journey, e.g. SYD-JNB-CPT-JNB-DUR (but only one of them can be a stopover)

Some options I can think of:

• MXP-MAD - purchased extra European segment, at the cost of an unused African segment - can be purchased in J or Y, followed by MAD-FRA in F on LA (as pointed out yesterday by Viajero)
  Note: IIRC there was some talk in this forum that TAs want to make the final continental flight the purchased one?"
• If you have the time to spare between business meetings in MXP and FRA, then do a surface segment: two ideas are
• MXP-BUD on MA followed by BUD to FRA on a choo-choo train (or even a riverboat if you have lots and lots of time), then FRA-HKG
• MXP-FRA by train thru the Alps followed by FRA-LHR-HKG

Also, iIf you finally fly LHR-HKG then if on the right day you can fly QF (according to some recent posts, QF in first with LHR-based cabin crew is the best of both worlds
Nothing in the rules to prevent it. And after all, you are travelling CPT-LHR-MCT-LHR which visits London twice; so what's the difference?

Don't quite see you problem here gcd123
You have three segments, you're in AKL and at the end you need to be in SYD to catch the SYD-JNB flight.
The trans-continentals give the most SCs (80)
The *ONEWC* has no restriction on the number of trans-continental flights (unlike the *ONE*)
Depending on what you end up doing with the unused African segments, you can have either surface segments or purchased extra flight segments in SWP
All in all you have a deal of flexibility in SWP