Since I am waiting for primer on the vertical stabilizer I decided to start on the rear spar assembly. First I needed to break the edges of the HS-609PP reinforcement bars so they would lay flush with the HS-603PP spar channels. I used scotch brite wheels on both the die and bench grinders to break the edges and smooth and polish the reinforcement bars. I ended up just using the bench grinder scotch brite medium and fine wheels because the die grinder made my compressor work double duty. Afterward, I final drilled the reinforcement bars to the rear spar with a #30 drill bit.
You can see why the edges need to be knocked down so it will sit flush on the rear spar
I preferred the scotch brite wheels over the vixen file.
