Thanks for the suggestions chaps.
I found the above-mentioned Oculus file as well as the settings file for ED that some suggested editing with the same IPD as found in the Oculus file. I tried 68mm and 55mm in both, and also played with my in-game height of 150cm vs 188cm. I ensured that IPD in both the Elite/FD settings file and Oculus files were identical (they weren't when I first look at the Elite settings file!)
My findings are that:
* No matter what combination I use, I'm smaller in-game than 6 feet, by quite a margin. My in-game avatar is a little guy, and not the 183cm (or 6ft) that I've seen suggested as the size of the character model. Unless of course VR is playing tricks on my mind.
* Interestingly, entering my size of 188cm AND IPD of 55mm yields almost identical results to entering 150cm AND IPD of 68mm. My avatar and scale of the cockpit are virtually identical. I MIGHT give a very, very slight edge to 188cm and 55mm IPD on the scale front, but it's a couple of percent at most. However, IPD of 55mm makes the world blurrier for me, so I prefer entering 150cm height and my "real" IPD of 68mm
Unless there are other settings I'm supposed to play with to get my character to truly look like he's 6 feet tall, I'd have to conclude that we'll be a bit smaller in the future. Note: I think 150cm and 68mm IPD is very playable - it's certainly nowhere near as bad as the height of 188cm and IPD of 68mm (real life settings) I tried before - that really made me feel small.