ThereWillBprints: I think you meant to say that to Jon (no "h") L., or am I misunderstanding?
Jon: As I forgot and printed the rearY piece at 60% instead of 100% infill, attempting to drill it with 5/16th kinda made a mess of it. The new screw-based design should solve any sizing issues nicely, so I'll just print up one of those as "rearY". I printed the "frontY" piece at 100% infill, so I'm hoping drilling it with the 5/16th goes better. Will edit shortly with outcome, maybe pics. Thanks as always for the info/help!
(edit) Actually, even the rearY piece might still be okay. Drilling out the frontY piece worked wonders at allowing the bottom rod to seat properly, but ran out of time before I could try drilling the shallower top rod's seating, guess I'll try that tomorrow.
On a separate note, how common is it for the front/rear pieces to twist out of "flatness" once under tension? Seems like that might be an issue, figured I'd ask.