Bill. I found the same problem width the 'B' rubber window molding. I found that after bending the metal clips inbedded in the rubber in then out the mounding still didn't stay in the groove. When I alternated the in/out bending, the molding fit tighter into the slot. This solved the problem.
I bought my replacement top from BAS International. Very happy working with them. The top was easy to install and the fit and finish was perfect. The only thing I had to salvage from the old top was the little U clips on the rear edge. Three weeks to receive it from England.