I have a model 1 and am aware of the limitations of the plywood flaperon hangars. This thread is largely for my own curiosity not a declaration of intent to change all my flaperon hangars.

I would like to know what the material and thicknesses are of the doublers and hangars? After some reading I'm guessing the doublers are aluminum and that they look like they're fairly thick. In the one video I watched the color of the hangars looks like it could be 4130 but lighting makes that guess a crap shoot.

I also am aware that I couldn't use the model 7 hangar without some modification since the portion attached to the flaperon has 1/4" gap between the tabs(for the plywood rib tail). As i said this is mostly curiosity about how it's done now.