Two alternatives:
1) don't
2) get a pro (make that a talented pro) to do it
Seriously, swaged fittings are everywhere, but the single common
comment in all the books I've read is that it's really easy to do
incorrectly ... without the problem being obvious. To my mind that
adds up to a good thing to stay away from.
For Potters, Nicopress sleeves seem to work just fine (at least they
have for me for decades), and there are viable alternatives (Sta-Lok
and competitors) for larger boats. Nicopress has the advantage that,
once you spend a nominal amount for a tool, you can work with them
anywhere; repairs (actually, replacement) are/is easy.
I've assembled a number of shrouds and stays with Nicopress sleeves,
and contrary to some rumors, they are easy to use and hard to misuse.
Regards,
Bill Combs
WWP 19 #439 (Aug 1987)
"Ursa Minor"
Fort Walton Beach FL
ttursine@gnt.net