avi123 wrote:

It is a known fact that the longer the mask's seal the more leaks you should expect.

I don't understand this...do you mean the 'older' the seal is the more leaks you should expect?

I use Neil Med...It's cheap and I get my refil packets under the Walgreens brand

I never used the FX, but with the Quattro I found that if it was too tight, it hurt my gums. Loose is better. It gives the cushion a chance to fill with air.