Fabricating the struts. My thought is that the aluminum block can function as the trunnion /rotation point. The strut itself extends into the block. The plate that was included with the strut to attach it as a fixed gear is bolted to the aluminum block and the toe-in can be adjusted with the tightening screw. The 1/2" aluminum round bar stock will be secured with a set screw and then set into bearings that will allow for rotation. Should be plenty strong enough even if I get up to the 50lb range (Which I really hope I don't).
More progress on the gear prototype. Wheel is a 6" Sullivan Sky Airflight that I've added real bearings to. Super smooth and looks pretty good IMO. In the end I want a more scale hub but for now I'm happy with it. You can see the pillow blocks I'm using for this prototype. These will work for a final version but they are heavier than I would like. I'll be keeping an eye out for lighter versions but if I can't find one this will absolutely be strong enough.
Got the main gear mocked up and I'm pretty happy with it. The pillow blocks are a touch on the heavy side, but the setup as a whole is rock solid. As long as I build my attachment points and gear mount plate strong enough these will do the trick.