If I'm in doubt at all, I use 3M hotmelts. I just love them, they take a little more time, but the end result is very good. Also if you are near the edge for a link margin, the unicams are more lossy and may put you over the limit.
It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com