> P D Wrote:
> -------------------------------------------------------
> > Kevin Manion Wrote:
>
> > -------------------------------------------------------
>
> > the bystarter chamber element is simply air filter material
>
> I'd just find some open cell foam and cut to fit . Cheap little foam
> sponge .
I traded my na50 off last year, but if I recall, the element was like you suggest. Black, open-cell foam, it looked like koi pond filter material.