Quick update, there was a break in weather so I went for quick ride the other night for about 1/2 hour:
Initial reports, after about 3 minutes wiggling I found a good position
( the problem is also getting used to being lower as the airhawke added another 1.5-2 inches )
No discomfort at all after settling in.
The wings on the seat DO stop my legs going down on a straight angle when stoping, so I found myself sliding forward a bit, I think this will change after more riding.
I will give a more indepth report once the weather improves and I get out for longer.
So far I give it 8.5/10 (where stock was 1/10, stock + airhawke was a 5/10)