Will the UFS mouthpiece fit in the fill-cap (top part with screw that tightens the o ring onto your atty) on a UFSv2? I have an atty extender, but it's the old one that you can't actually put a drip tip into, so I was wondering if there were other options that'd allow me to use a normal atty with the extender on a UFS in extended mode (extra ss fitting)?