G'day, Matthew,
No, I don't have any concern. If it doesn't fit, I believe the seller will make it good. Air Calgary sells a lot of stuff on ebay and I don't think he can afford a nasty feedback. I'll keep you posted. It was shipped today.
By the way ... when I worked in the Middle East, I used to vacation a lot in Phuket Island, Thailand. Drank a many a beer on that beach with Aussie's. They always out-drank me. Been there?
Hugh