I do it two ways. Both require a ply plate inside the pant. You have to rough up the glass really good to get a good bond to the wood plate.

The first method is to set the pant where you want it, drill a hole through the halco gear into the pant and block above the axle, and put a blind nut on the inside and a screw through the halco gear through the pant and block into the blind nut. I use 2-56 screws for that. It holds really well and is solid. You have to drill the pant and block for the axle bolt head on the axle.

The second is the steering arm method. You do the same thing, with the block, but on the inside, you put a steering arm with the screw to the bottom so you can put it on the axle and tighten it. On the inside, you just mount the arm into the block at any angle you want but make sure it is solid. I use a second plate so the arm is flat inside and screw it in, then glue around it with epoxy and cotton flox or something like that which is really strong. It won't let go. Straight epoxy will work, but is not as strong. Again, the pant needs to be drilled for the axle and bolt head on the out side of the gear. Then you put the pant, wheel and collar on, and set the pant where you want it and tighten everything up. It holds well too, but can move it if needs to. I find they tend to break the wheel pant before it gets moved so either method works really well.

Good luck. I used the first method on my shoe.