You actually ride it with the trailer tires?
What bikes do you have that never came with signals?there's no inspections here for anything in the vehicle code-- not lights, tires, mufflers, nor in some other states as well. the law here says turn signals are required for anything built after 1967, but I've got four machines a bit newer than that that never came with any from the factory. all of em have mudguards and chain guards though.
directional signals are mostly placebos out here. I'm used to being invisible to the cage drivers, and wouldn't trust oncoming traffic to see a signal even if i had them. i turn the headlight on if i enter a built-up area, but i don't expect people to see that either.