Finished installing clamps to keep the fuel / brake / and pitot-static lines from bouncing around. Cut lengths of wire loom to go over parts to keep them from abrading each other, then secured some of the lines to neighboring lines to snug 'em just a bit tighter.
Removed cushion from one clamp and secured it around some 1/16" wire wrap to snug the pitot-static lines just a bit closer to the floor. They were sticking up just enough to lightly hit the torque tube/elevator control attachment.
I had previously just attached the elevator rod to the front of the torque tube to check for clarances with the rod end attached. I then noticed today that the rod hung down a bit at the back of the tunnel, so I attached the elevator control bellcrank to secure the control rod, giving me an accurate indication of clearance between the control rod and the lines underneath it. Had to rework where some of the lines were ziptied to each other to give just a bit more clearance.
Drilled 7/8" holes in the sliding seat supports to provide conduit areas for wiring that will run down each side of the plane.