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<<What temperature do you need to get to anneal the
aluminum?  My household oven goes to 500 F or so.  Will this do?  (Obviously,
with this approach I need to wait until my wife is out of the house...)>>

500 deg F will begin to anneal the flared tubing, in particular the work
hardened areas.  However, this will also affect the temper of the B-nuts and
sleeves, assuming you are using the aluminum variety.  These are typically 2014
or 2024 aluminum and 500 deg F is above the aging temperature for these two
alloys.  I would stick to local heating of the flared ends only.

Chris Zavatson
N91CZ 360std
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