Advice on Glue and Coral Skeleton Base Trimming

[CaptainYooh]

Good day everyone. Two questions:
1) Following someone's advice here, I bought SuperGlue from the Dollarama and tried using it to attach a frag to live rock. The glue was sold in four small tubes similar in size and appearance to brand name Crazy Glue. It's very liquid and flows freely out of the tube. I poured some over on the frag base and quickly tried attaching it to the rock. Didn't work. Plus, the coral was so stressed out that it stayed closed all day next day (it's doing OK now since we've left it alone for a few days). The glue on the photographs I've seen on one of the forums looked kind of like a lump of silicone. Am I using the right stuff? If not, please advise. Also, do we apply the glue on the coral only or coral and live rock as well?

2) A couple of our frags don't fit in the live rock crevices well. Can we simply trim coral skeleton base with a sharp knife without damaging the coral? If yes, a link to a proper reference on how to do it would be very much appreciated.

Thank you kindly.