I've been using a chunk of aluminum tubing about 1/16" id. Just cut off a peice about 3/16". Run the wire thru the crimp, then thru the servo horn or clevis rigger, then back thru the crimp then loop around and one more time thru the crimp..... Then crimp it on both ends.... Really strong....

I've also used the "twist and melt" method from Don Incolls.... I liked it, but it takes more room to do the connection.