Just an idea, but maybe you could bend the landing gear wire to go straight down for just a bit before bending it out horizontal for the axle? Then you could glue the pant to the vertical part, with the axle poking through both sides of the pant, thus preventing the pant from rotating around? It's hard to keep something from rotating if it's just glued to a straight piece of .025" wire.
Or you could explore other materials for the landing gear. How about 1/64" steam bent ply, veneer, or bamgoo? Like this, only in wood:

You might have to fiddle a bit to get the right combination of stiffness and strength while remaining light. I guess carbon wouldn't be in the right spirit (or maybe not legal?) for an embryo. Maybe you could shave a bamboo skewer flat and then bend it. I have an indoor model with bamboo landing gear which seem strong enough and actually ended up lighter than the carbon rods used on the original design. The pant could provide support for an axle.
Wheel pants