I think it's taken me a few years to figure out that when I install a FO it needs to be tight... loose = flying fiber... I usualy end up field replacing my in a hurry, the last one I did at home has lasted over a year, so taking your time is the best way.
FO is cheap, I ordered Dawson Precision FO from their web site, just get the right size, $7 or so I think? Been a while, a stick lasts a while.