The difficulty with refoaming/reconing arises from not using a turntable to spin the basket while applying glue(an old cheapo audio tt works great). It's also easy to apply too much too quickly. Hobby shops carry long thin nozzles that slip on the integral ones. You can snip it off at the desired size. Very easy to ride it under the lip while spinning. Make sure to use a 30hz test tone. Perfect outcome.