If I wanted to try the new wax free seals, knowing that the wax ones are
proven technology, does anyone have experience with the pros and cons of the
ones made by Fluidmaster or Fernco:

Fluidmaster:
http://www.fluidmaster.com/pdf/7500_instructions.pdf

Fernco:
http://www.fernco.com/FTS.html

Supposedly they were all created from this one:
http://www.plumb-bob.com/ultraseals.html

That generated this article:
http://www.pmmag.com/CDA/ArticleInfo...3745%2C00.html

Thanks for your time in answering,

Ben