I just used longer tubes to make the 76. Actually the one I designed myself will hold any length kb.
I'm not understanding. I managed to buy a 7-8 foot USS tube with the intention of cutting it down to fit my keyboard. When I asked locally about cutting it, they told me you can't get a clean "slice."
Did you also have a long black USS tube that you modified?
I telephoned Jasper and they said they're not sure if the circumference of the two tubings are the same.