Has anyone noticed that their beer picks up a taint between pours (no less than 1 h)? I've contacted KK and they are adamant that all parts are either ABS or 304 (food safe, albeit in this case sourced and manufactured in China). Whilst I have every reason to believe the good people at KK, this gun turns perfectly acceptable beer into something undrinkable only until the volume in the gun has been purged.