Brief Description: Up drill spar blocks and angles.
Today I up drilled the blocks and attachment angles from 3/16 to 1/4 in. All went very well. However I am still not sure which method to use for the final up drill to 3/8. That is where I goofed up last attampt. I will talk with Kerry from Sonex tech support tomorrow. My biggest concern is getting a tight fit hole for the spar block pins.