I like your first comment about flat screw drivers.
Another story, 1970 Myself, my wife, and brother-in-law drove our 1964 Custom 500 Ford to Glendive Montana for the drag races. Ran into a rear axle wheel bearing problem. After the races, someone suggested we go to this particular service station. We arrived two young guys thought they could fix it. I suggested that if they let me into the back I could do it or give them advice. No go. After an hour I asked if they could call the owner. He came down, turned out that one was his son. As he was working on the car, he noticed an interior car warmer screwed to the dash. Didn’t know what it was. Wanted to buy it. I said okay, then he wanted to know what those square headed screws were, so I told him, then he asked if I had the screwdriver I said yes. He wanted to buy everything because no one else would have one.
He was so pleased, he offered us a real deal on 4 tires that we couldn’t resist.
Since you have Robertson screws, do they turn in the same direction as the water drains heh heh??!!