: Michael, Mike, Bill, I am always amazed at the expertise I find on this
: board. Michael I once used Hydro Chloric acid for etching a design so I’m
: vaguely familiar with that. Seems we wore goggles and heavy rubber gloves.
: Mike the tubing I’m using is called telescoping aluminum tubing and was
: really hard to find online in sizes that didn’t run the shipping well over
: a hundred dollars. It has an overall tolerance of .009 between the two
: tubes sizes that wouldn’t work with the heating cooling idea. Bill the
: first thought that came to mind was I going to sand with thinned epoxy as
: you suggested but the grit left inside the tube in the sticky epoxy
: solution would be hard to get out, and it doesn’t take much grit to seize
: the tubes up. So I will go with sanding one section at a time and
: immediately get that section epoxied together before doing the next
: section.

: Thanks guys I’ll only get one shot at this and didn’t want to mess it up.
: John

Btw John,

Though it's kinda a pain, you can use countersunk pop rivits then after they are pulled tight just file the edges flush. Kinda a pain but it works. You do have to drill a fairly accurate hole for the rivit head, I just use and oversize drill bit, not really perfect as most drill bit's angles are a little flat, but it works well enough. Btw, use aluminum rivits with and aluminum mandrel or it'll be really difficult to file them flush without making a flat spot on the tube.

Bill H.

Bill H.