i have the wheeleez cradle style cart i purchased from wheeleez. i use it for my PA 12 and the outback before that.
if you need to go through sand, the wheeleez wheels are awesome!
i do not like the scupper cart. i had to replace my outback haul because it ruptured the scupper hole and i damn near sank off of LJ. thats why i got the cradle style, paranoia
there is no easy solution when it comes to carts. if using the scupper type, you have to lean the yak on it side to insert the wheels, so... all your loose gear slides off the yak in the process.
the cradle style you have to lift the yak onto the cart and then strap it to the yak. even though i have to fit the yak to the cart, it's still better than the scupper carts in my opinion.
the wheeleez cart fits the PA 12 better than the outback. neither one is a perfect fit but close enough to work out of the box.
use a little bit of paddling (pool noddle) for the outback to make it fit better.
if you put the wheels right over the hobie logo it will be balanced and is very easy to maneuver, pushing or pulling.
the wheeleez wheels are worth every penny if you pull your yak across sand or uneven surfaces.