The overlapp can be made more pronounced by knitting a couple of extra rows on the main bed. A friend's question hopefully answered.
A slightly overlapping Pintuck is required, I have done somethig similar a few years ago on a golfshirt collar, but this did not overlapp, just stopped the collar ends from curling under. Here is the Test swatch.
Current test for a small overlapp of the pintuck. tan col. swatch at top.