JerryJimmyB,
My H170 had mid-boom sheeting, and my P23 has end-boom sheeting. One of the differenced I noticed is how much more main sheet I have in the cockpit compared to the H170. However, it is usually at the back of the cockpit, under the tiller, and not a problem. Not sure how it would be with a wheel. I also found that the mid-boom sheeted faster. Since it moves less there is less hand-over-hand action required for same boom distance. How do you like your P15? I also have a P13.
JerryA