Thanks Christian & Jmeckel...
I test fitted one side piece and they are rather tight in both width and length. Also, the structure of the side pieces are rather 'gooey' which might help prevent them from slipping or coming out. The old ones had no adhesive... therefore, while I certainly understand a need for adhesive on the upper seal, I am choosing NOT to use any of it on the side felts. I suppose I can always glue them should the fail. Unfortunately, the supplier of the kit supplied 'yellow' adhesive... whay do they do that? Respectfully to all responders... the SALTMAN