Yep forgot it on mine. Had to peel the covering and do a little planing and sanding.

What bugs me is that their quality control is so poor that they have to include this piece as something you may/may not have to use depending on what? Their ever varying build jigs?

This is my first ARF and might very well be my last. I just prefer building. Too many things I see that are just done sloppy or poorly. Don't get me wrong, at $200 it's still a heck of a deal and a fine flying airplane. It's just the quality of the workmanship leaves me a bit cold.