Yes this was us. New material Viton= much better.---No more difficult to install.
Look for manila envelopes 5x8 that we are sending out with new seals.
I do apologize that my trying to improve the product created the problem.
I have a tail cone of a tail shift that I have to check fit. On the we can push them in and make a tight seal. But we have the advantage of lots of light and better access.
Those that have install them, there is no reason to pull them. You will have a VERY tight seal. It just went in much harder that it should have.