I noticed no word on capacity/max weight etc on the website. I can understand not wanting to set some arbitrary number with all the variables involved in mounting etc and the stupid things people do.
I am concerned about the loads/torque a puller could transfer down to the mount, but with the railings on the 25 in the way, mounting items ON the gunwale is nearly impossible. The only two spots available are just aft of the cabin bulkhead and they are needed for ingress/egress of the boat/cockpit. I'm running into the same issue in mounting my dinghy outboard. I have that one figured out though; it will involve adding a stanchion towards the bow end of the cockpit rail w/ a block attached.
The search continues.