I am not very expert but I think aluminum tubing will not take
the bending when the gear flexes. The standards are
(1) nyloseal (2) stainless steel
Stainless is quite expensive but you can make a heat-proof
system with very few parts. 1/8" tubing is used.
Nyloseal is much cheaper but must be protected from heat
and UV light. There was a discussion on canard-aviators@
yahoogroups.com on protecting nyloseal from heat. The
emails are archived but I don't know how to retrieve them.
email me direct for more information at
bruce@ywave.com