Dang it, this light line is killin' me! I used a double uni to splice a 4 lb fluoro leader to 10 lb braid, thought it was foolproof but hung up and the fluoro broke at the uni, it was a pretty hard pull and I'm not used to the 4 lb line yet but didn't think it shoulda broke. But the good news is my knot at the jig held.

Disclaimer .... I've used nothing but heavy fluoro and braid for years and it's possible I just didn't tie a clean knot, but is there something better than the double uni?