Installed and pilot drilled the idler assembly behind the seat support as called out in the C06 plans page (the page that replaces the F-10 page when implementing the "lowered seat" option).
This was actually really easy, as the proper orientation is set solidly by the two attach clips on the seat support and the idler angle bracket against the aft fuselage #1 lower crosstie. I checked to make sure the idler was at 90 degrees and properly aligned with the pushrod hole in the seat support, which was all perfect.
Now that this is pilot drilled in place, it's time to updrill everything, disassemble/deburr, and then rivet!