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C'mon Doug, I hardly think it shifting 185 microns is going to amount to a lot of wear and tear!
CF is the way to go for these tubes. It's light but strong. I'm sure someone can engineer the mounts for the dovetails so that one has slip in one direction but it's firmly held perpendicular to that direction.
I understand that it will cost more, everywhere else in the world Aluminium is cheap, not in Aus though, so if you price Al tube locally it would be much of a muchness. This probably shows that the Chinese CF industry is not up the the standard of the developed world. I have Kevlar parts made for cars, hand made by a guy here, who charges less than $500 each for them.
If you can get me the dimensions of the tube I can ask him to make some if anyone is interested.
Cheers
Stuart
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