Well, it's not really a planetarium, but it sure looks like one! It's actually the roof shell of my heavyweight passenger car after drilling 74 holes in it. I'm bashing the car into a DL&W Electric MU from the Morris and Essex commuter line in NJ. The holes are for roofwalk supports and insulators. I actually drilled 4 more holes for the pantographs which makes a total of 78! Here's a template I made to make the task easier. The brass drilling template was made from a paper CAD print. I just made the brass snugly fit the roof shell, taped the paper CAD print onto the brass, drilled through the paper and into the brass and voila! Drilling template! I only had to drill half the holes in the brass template because each end of the car is a mirror image of the other. I just swap the drilling template to the other end of the car and keep on drillin'! One down, 9 more to go... (NOW you know why I made a drilling template!)
A bit OT, but about the "Planetarium" comment... My brother was an Ironworker and his job was to weld down the corrugated metal floor decking after the steel beams and columns went up. When he was a rookie and didn't have the arc welder amperage right he would sometimes burn through the decking. His foreman would QC his work by going to the level below and look up for tell-tale daylight coming through the burn holes. He once stormed up to the top deck screaming "Who the [bleep] is welding the decking up here?!!! I was just one deck down, I looked up and I swear it looked like a [bleep] [bleep] planetarium down there!!!" Don't know what he would say about my heavyweight coach shell.
