Hmm.... I might be convinced to go with the easier to use Push-on air connectors instead of the Nylo-seal...

See this thread on Van's Air Force.  I do have a complete set of push-ons that I purchased early on from SafeAir, so it's easy for me to make that switch.  Two key notes from the thread - The tubing should have straight and clean cuts (I have a tool for that) and you need to hear two clicks when pushing in the tube to the fitting.

SteinAir (who really recommends them over Nylo-seals) has a good selection of parts here.