Hi eric, I've attached a repaired model here, please give this one a try and see if it will work now.

I'm not sure how that area got messed up, but there was an area that had some edges missing, there was a big gap between some edges in a trimming loop in that spot.

Anyway, I repaired it by extracting that area using Edit/Separate, breaking it into some individual surfaces and doing some untrimming (that's where you select all edges and delete them to recover the underlying surface).

That let me reconstruct one of those side pieces, which I then moved slightly (the originals were slightly off center), then arrayed it and unioned it and joined the repaired piece back into the main model.


I don't really know how that messed up area got created, possibly some kind of intersection bug but unfortunately it is difficult to track down what happened just by looking at the completed model.

Let me know if you still have any problems with the repaired version.

- Michael