There is a reason the revo has no easy way to grip. This worked great until i tightened just a little too hard with a tool and broke the threading from the coldside stopper bump. It didnt take much force at all to shear the threaading from the inner tube which allowed the stopper to move. This then let it thread in further than expected, changing the hotend geometry and it would work its way loose during prints.

Im pretty sure its my fault so 4 stars as it worked great for a great many prints before i broke but definitely keep an eye on on the spacing between meltzone and threads.