Brief Description: Drill Firewall for Control Cables
I measured and drilled the firewall for the throttle, carb heat, mixture, and nose gear access holes. I started with a #40 bit, followed by a #30, and finished these holes off with a unibit. I tried cutting the 2" hole for the heat valve using a hole saw but it didn't work. There were a lot of sparks and everything heated up, but the firewall was barely scratched. Time to buy some greenlee punches off ebay!
Throttle, carb heat, mixture, and nose gear access holes drilled
