Tonight I test fit the idler bars, and sanded down the flanges of the idler bracket to ensure clearance. These bars are responsible for the transition from one elevator pushrod to another, and must swing freely through the full range of motion. At first they were rubbing slightly on the bracket, but after some patient sanding with Emory cloth I was able to achieve the appropriate clearance. Hopefully it’s enough to still clear the bracket after I prime the parts.