I actually just bought one yesterday, it was a bit of a PITA to attach and I have the nasty razor cut on my finger to rpove it
The only reason it was a problem for me through is like the lazy guy I am I didn't bother trying to scrape all the coraline off of my hammerhead before I put the glue one, so of course it did not stick. Once I scraped it off and sandpapered the float and the scraper it worked awesome.