All very interesting, and nice picture Tony. This little trap is an area that has needed covering. I thank you guys for your collective input and I am a lot happier going forward with my carrier, now that I have had the benefit of your input. Thank you again Tony and Alistair.
I must say that Andrew R. said the Aussie cross bore plug has a hole in it. I have not seen the critter in real life ( carrier part no. 656-6) There is no picture (that I am aware of) and no ref. to a hole. Maybe one of the other LP2 guys can chime in to clarify the details of this (1/4 BSP) plug / restrictor.
Tony, the last line, of your last post, is that a pit trap for catching Kiwis?