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Countersinked all of the #40 rivet holes in the wing spar
After a few whacks with the Microstop Countersink in the air drill, I managed to get the depth of the countersink just right. Then I went to town, countersinkin’ them rivet holes, occasionally checking the depth with my scrap piece of dimpled sheet metal. By the time I got close to the end of that multitude of rivet holes, I started to smell something that indicated to me that something is getting hot. I walked over to the my Sears P.O.S. air compressor and felt the radiant heat off the motor and decided "Maybe it needs a break". After letting it cool off I finished the rest of the countersinks. My next compressor will have the air pump driven by a belt from a separate motor and have a 60 gallon tank.
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