Latest attempt at in-car glider storage.
4 hand clamps, one at each end of a length of electrical conduit.
The clamps can be forced into the end of oval plastic conduit and secured with a screw.
The oval conduit then runs inside a length of round conduit for added rigidity. This also allows it to 'telescope' to different lengths so that the rack can be accommodated in either the Bentley or the Lamborghini.
This setup has the added bonus that no models are visible to passersby when the car is parked.