16 May 2025 - 1.5 hours

I guess there is always more prep to do on the wings ribs... I enlarged the tooling hole in the forward lower part of the W-710 and W-711 ribs to give a location for the AOA tubing. I drilled this out to 7/16" to match the hole that is already there for the pitot tubing.

I also marked and drilled the location for a 3/4" hole in the ribs for the conduit that will hold wiring later on. I just put it in the Van's-specified location between the first and second lightening holes. I drilled with #30 a starter hole and then went to get my stepped drill bit to enlarge it to 3/4". Oddly enough, my main step drill maxes out at 1/2" and my other one is large enough but doesn't have an exact 3/4" step...it must be metric steps but listed in the nearest 1/64" imperial measurement. I guess I'll need to pick up a new step bit that actually has a 3/4" step.