In airplanes with wing tubes it's pretty certain that the structure around the wing tube is the strongest part of the fuselage. After all, the airplane 'hangs' from the wing tube during flight. So the larger and heavier the airplane is, securing it for transport using a dummy wing tube makes good sense. It keeps the wheels off the ground and avoids any stress on the landing gear. And Wing Tube supports are fast and easy to load because the dummy wing tube 'nests' into them, letting you secure the rubber hold down straps when you're ready.
Gear Jack Wing Tube Supports accommodate a wide range of wing tube diameters—from 5/8" [16mm] to 2-1/4" [57mm]. And short, dummy wing tubes can be made from pvc pipe, aluminum tubing, or wood dowels. Gear Jack Wing Tube Supports ship with 6" long lifting tubes. You can check out the maximum height (reach) on the Tech Specs page here. If you need more reach, longer lifting tubes are available here.
If you decide to use Wing Tube supports we recommend also using a Gear Jack Tail Support. You'll notice that when you have your airplane sitting in the Wing Tube supports the tail will come off the ground very easily (it should if the CG is right!). Whether it's a Gear Jack or your own invention, you'll need to secure the tail.