HI Pwyll!
I had not even thought of pipe mods. I will give that some thought and see what I might be able to come up with for it . Do you have anything in mind that would be of help ? What do you think would be good for it . I have never used one myself so I am sure you would know better what would be usefull.
No, I do not have anything in mind that would be of help. That's one of the reasons I hadn't contacted you, I've actually come up with a couple of radically different ideas and am not sure which I would prefer. They would be very difficult for me to describe, so I will see about working up some sketches or something and PMing them to you in the hopes that they may be of service (either to give you ideas or prove the concept outside your range of interest