Ok.....I'm sure my results will be called suspect since I'm the one who sells it but here goes. This is how I remember how to test them. Just take a look at the pictures. This is my wife's rig. #18 wing, standard aluminum DIR style plate and harness. All right off the shelf stuff I sell. Weights right at 5lbs. I then put the wing/plate/harness etc on an 80cf aluminum cylinder and filled the wing with a flush hose thought the inflator till the OPV was venting. Pictures are of wing mounted on cylinder full of water and you can see it has expanded about as far as it can. Took it off the cylinder and hung it back up on the scale and it's about 26lbs.....So if i figure it correctly 26lbs - 5lbs =21lbs. So I guess I sold everyone wings with a lift of #21 not actually #18...then again that was with it filled to the point the OPV was leaking.
NOTE....I don't have a #35 here to test....I don't have any need for one so there are none in service here in FLA.When they arrive in a couple of weeks I will ask a customer if I can test their wing and post the results. What I won't do is take a new wing, fill it with water for testing then send it on to a customer telling them it's brand new. Of course I'll make it worth their while to let me get it wet.