Simon, Walter, thanks.
I've ordered some Gorilla Glue (the polyurethane version) for gluing the tubes, as I had been using CA for that, with mixed results. I'm assuming that Gorilla Glue won't be much good for segmenting, as it foams, but I could be wrong? I was thinking that epoxy would be a better choice for segmenting? Is there any brand that's considered best? I was thinking of getting one of the West System packs, but is there anything better (or as good but, cheaper)?