"A regular eye splice can work itself loose if the line is repeatedly loaded and unloaded if it hasn't been whipped/lock stitched - which opens another can of worms..."
I read that, but like I said... I have had 12 long tuck eye splices on trap lines for over 2 years and none of them have ever come loose. This would be the ideal situation for them to loosen. Oh, and none of them were lock stitched