At one time Robart made special gear legs for Ryan ST's that seemed to have the same problem you have with the GB. I don't know if they have an equivalent set up for your plane but it couldn't hurt to ask. That has to be a very interesting airplane in the air. I'm so old I remember when Chester Allen crunched one at Burbank. All that was left was part of the cockpit canopy and the top half of the vertical stabilizer. You should do much better with a model.