I assembled the maple face frame using glue and pocket screws. I got it nice and square. I fabricated the tracks out of maple. Following the Kuffel Creek plans I cut my dados 1/4 " wide by 5/32 deep. I clamped and glued the the tracks to the face frame and let it sit over night.
I started fabricating the doors this morning. For the doors, I'm using 1/4" maple veneer plywood. The Kuffel Creek plans don't specifically say how to insert the doors the tracks. I assumed that I could insert one end of the plywood door into the bottom track and bend just enough to insert it into the top track. However, it turns out that 1/4 inch plywood is not nearly as flexible as I thought it would be. So, I tried trimming the doors just a little bit. so that I could get insert them in the tracks. That didn't work either as they now have a tendency to jump out of the tracks when I open and close them. I'm finding it impossible to find the length where the doors can be inserted into the tracks AND operate reliably once they are in there.

Now, I'm wondering if I should have put the doors into the tracks BEFORE glueing the tracks into the face frame. But that would have made the clamping process next to impossible. I really don't want to rebuild that face frame if I can avoid it. Any ideas or suggestions would be VERY welcome at this point.
Thanks