Did the first drilling on the rear spar. I used the drill press and #30 reamer. Works great. I didn't have the conversion coating and primer (using SANCHEM 6100 and Sealer #2), so I didn't do the riveting of the center elevator bearing assembly. I want to coat and prime the pieces first. I ordered the Van's touch up paint for the powdercoated parts (HS-411PP Brackets) so I can set the bearing assembly rivets "wet" to prevent dissimilar metals corrosion.