Boat fit
How does it matter about boat fit?
When you’re using a P-float for a recovery you’re out of the boat anyway (practicing? - try anything). Reaching into the cockpit when you’re in the water beside the kayak is no harder that getting something off deck. Might even be easier since you can have a good hold on the boat at the same time.
Assuming you have you flat stowed well and in an accessible location in the cockpit, of course.
Call me crazy - but I HATE floats and pumps (or anything but spare paddles/leashes) on deck - EXCEPT foam floats in frigid waters for obvious reasons (not that I paddle those conditions).