The brake on mine is hooked up but I am having some issues with that. Actually, having issues with the rear brake on the bike. Getting a few different opinions from people but one guy said he wouldn't bother with the sidecar brake at all since the whole set up is pretty light.
Before I took it home, Perry was giving me some instruction and I mentioned that there was no rear brake. Did some adjustments and seemed like everything was OK (he had it with a split between some rear and some sidecar). Later on, I had a guy help me get it to my house when I bought it and he said "You have no rear brake". He had it up to pretty high highway speeds. But even at slow speeds it does feel like I've lost it from the rear again. Perry said that loosening the sidecar brake would add braking to the rear on the bike. I haven't had time to play with this but the sidecar brakes do add complications that I didn't expect. It is cabled and connected to the rear brake pedal, BTW.
I like the windscreen on yours much better than mine and I have been looking into some DIY options of making a shorter one. I think mine makes it comfortable for a passenger but until I have a regular one over there, I think a shorter one will look better and provide less drag.