Drilled the aft holes in the HS. After careful measuring and double checking the measurement from the firewall to the tip of the HS, 155 9/16" on both sides. Shimmed the rear spar up 3/16" and checked for 0 degrees incidence. Drilled to #30 initially then enlarged to 3/16". Attached the elevators and cut the pushrod tube to proper length. Primed the inside and outside of the pushrod tube.