Thanks @Mash Monster - I found the David Heath video. He appears to be using the top port as the entry point and the bottom as the exit which is the reverse of the Blichmann Hop Rocket instructions - is that how you do it? From the video, pellets and hulls in a hop sock appear to work well.There is a YouTube video by David Heath about the hop missile I can’t seem to post the link I’m sure you can find it quite easily