I decided to try the gluing method tonight. We'll see how it works out.
The first thing I did was cut a bunch of slots in the coroplast groove that the rod runs through.
The glue I used was a silicon rtv. To get a good bond, I basically smeared it on the cut slot and pushed it into the slot with my finger.
To position the rods in the proper position I used the precision height of a pocket knife to hold the rods at approximately 45 degrees.