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When I looked into the double flare technique I gathered that it was not
recommended for use with the sleeve/b-nut method. The AC doesn't cover the
subject in depth. I use a cheap Rol-aire and have to flare halfway, then
rotate the tube 180deg in the die and flare to final depth. The cone
doesn't line up perfectly otherwise. I just couldn't justify the expense
for the better tool.

The chapter tech-counselors said to ensure I remove the burrs before and
scotchbrite the whole tube after bending/flaring. Over-tightening seems to
be the issue with these lines. I still crack flares occasionally (usually
after a complex bend  and first flare.) I can't see any problems with what
I'm doing, but let me know if I am. What about alodining the outside?

Theo
Glasair SuperII-RG

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