I can never remember an occasion when the QXC was done after skill tests?
Up until July 1999 there was no requirement to complete the QXC prior to the GST. In any event it could not be completed until after the NFT which was introduced in the 80s as a result of people were getting lost on the QXC.
There was a big ho-ha when the JAA required the 150nm Solo X-CTY, which replaced the QXC, to be completed prior to the Skill Test, as part of the training! Once it became part of the training it was fully documented and there was no further need for a meaningless certificate signed by an airport cleaner saying how good the candidates airmanship was!
Back in the seventies the QXC was only valid for six months,
In the 80s and 90s it was 9 months!