Thanks so much Gordon I'll have a look around. Thank you to everyone (Doug, Mike, Paul, Ernesto)who responded with ideas and suggestions, I did get it installed by pinching the gasket in half (length wise) a bit at a time and setting the front ( it would be nice to know the real terms for these parts) edge of the gasket channel "foot" into the actual channel and using a blunt trim tool pushed the rear of the "foot" into the channel, repeat, repeat, repeat. I started in the middle as the ends and curved areas were the most challenging, you can kinda tell when it's seated correctly as the "edges" (front and back) are smooth and laying down on the top . I then added the screw on each side and pulled slowly the leading edge of the gasket over the leading edge of the top you could possibly use the rope trick for gaskets but I did not try it that way. Extra fingertips would come in handy as mine are pretty sore from pinching and tucking.
I'm using the term gasket for weatherstripping.
Tom j