HeadLock fixes this issue with a very simple solution. They make a small device which goes inside the shaft which you screw the head into and it gives it a secure fit. It is made of a proprietary high-strength plastic which they call ThermoPlastic and is pretty easy to install. For my review, I put one of these on my East Coast Dyes Focus with Nike CEO.

Installation
Step 1: Insert the HeadLock device into the shaft with the "wings" pointing to the top of the shaft. (Optionally, if necessary put a layer of tape over the shaft to help the head fit on it without much rattle).

Step 2: Push the HeadLock into the shaft so the hole you are using on the shaft lines up with one of the holes on the HeadLock


(Tip: If you accidentally push the HeadLock too far into the shaft, use a pair of pliers to grip the tab at the top and pull it up gently)
Step 3: Put the head on the shaft.

Step 4: Screw the included screw (which is a little bit shorter than a standard lacrosse screw) into the head, shaft and HeadLock.


Performance
Overall the HeadLock is a fantastic, simple, little accessory that fixes a long time annoying issue in lacrosse. Although the installation may be a little bit frustrating for some (I had no issues but could foresee lining it up correctly to give some people a problem), the end result is fantastic. I'd recommend the HeadLock to anyone getting annoyed with these issues with their sticks.