I've been having a play tonight and the conclusion I've drawn is I don't like korda IQ, I've noticed when tightening the knots down it's done a couple of strange things tonight one of them stretched and concertinered a bit, another one seemed to develop a nick in the fluorocarbon where none were before,which would almost certainly be a weak spot, I won't be using it again anyway, it just doesn't give me confidence
so it's back to the drawing board may have found a solution to the silicone problem though wide gapes with there in turned eye that seemed to kick them over nicely , I might try using the avid pin down leader material in the morning I've been happy with my leaders so far so may work as a boom section
If not I may just go back to tungsten loaded knotless knot and shrink tube,they used to work in the olden days quite well