I am about to mount the landing gear and realized that I really needed to mount the tailwheel first. So I mounted the tailwheel to the tail spring. Then I had to drill a hole from the bottom of the tail spring through the hole that is already in the tail spring mount (WD-409). I put it in position and started drilling upward through the hole in the tail spring mount. Once I had the hole started, I took out the tail spring and finished drilling the hole through it using the drill press. I would have never been able to drill the hole up from the bottom - it was hard enough on the drill press. Now the hole is in but I haven't had the chance to see if the holes line up.