Is there anything wrong with my planned itinerary for RTW Qantas oneworld redemption?

Frequent Flyer Programs
#1

Hi everyone - another post about RTW trip planning and hoping to get some guidance if this is feasible?

I’m based in Sydney and trying to put together a plan similar to this article (Perks of starting your Qantas oneworld Classic Reward overseas) by positioning my starting flight out of BKK.

BKK-HEL-BER (Stop 1 in Berlin)
BER-LHR-ATH (Stop 2 in Athens)
ATH-CDG (Stop 3 in Paris)
CDG-LHR-SIN-SYD (Stop 4 in Sydney with a long transit back home)

And then resuming months later

SYD-SIN (Stop 5 in Singapore)
SIN-SYD (Return back home)

Would obviously find a positioning flight to BKK to start - but wasn’t sure if the SIN/SYD legs would work?

Any advice or guidance much appreciated!

#2

The itinerary seems to check out fine to me. After revisiting the rules on some of the PointHacks RTW articles.

Disclaimer: I’ve not done a RTW redemption before.