You mentioned those big arm signals worked smooth. What kind of signals did you use for the basic stuff like stop, go, and lower? Did you guys have any pre-set signs, or did you just make it up on the spot?

Wow, stumbling onto stuff like that must feel so strange. @abby_barnes's church server story really shows how common these odd finds are. It's tough when something unauthorized is actually doing good for folks. Talking it over with the owner was definitely the right call.