FAFCO panel repair - the rubber cones don't work - got alternate repair method?

[Slippery]

I have FAFCO panels I bought used. I got the repair kit that comes with a speedball cutter and the rubber cones from AMAZON. The problem I am having is to push them in hard enough to not leak bends the poking tool it came with. So I used a rubber mallet and a chop stick but even that is not good enough. I have other panels from a different manufacturer where I used a screw and nothing else and got no leaks. I tried the same screw method on the FAFCOs but the screw head is too wide and it still leaks.

Has anyone come up with a different method for the FAFOC panels to plug the leaks?

Thanks for all the knowledge this great community has bestowed upon this curious, frugal desirer of knowledge.

 

[mknauss]

Sorry you have not received any responses. Let's see if this bump helps.