I have been riding the JP 8'10 pro for the last six months and found it pretty well the perfect board in a variety of conditions, ie point breaks, beach breaks, and very stable in lumpy conditions.
I didn't find it had too much rocker with fairly good glide for a wave board.
I've now decided to get out of my comfort zone and step down to the 8'6 after Jon from Surf FX giving me one to demo, I couldn't resist trading the 8'10 for the 8'6.
This little board absolutely rips, lost a bit of stability and glide, floatation is good at 110 L with my 87 kgs.
Only thing I have found is that my lower back is sore,

which i didn't have from riding the 8'10, but i do have a bad back and being on the wrong side of 50 doesn't help, oh yeah, conditions were lumpy........, think thats enough excuses