This combination does not work well for everyone, for 2 main reasons:


Roll: 

The shaft diameter of a dragon staff makes a huge difference on how fast it rolls, or travels along your body. Most people prefer 22mm, while some like 19mm. A 15mm/18mm diameter shaft makes for a very slow roll that some people love, but is too slow for most.

DIY solution: Add more grip! Wrap more layers of grip to increase your shaft diameter.


Twist:

The tubes on the ends of flowtoys 18mm composite staffs are held on with pop socket plugs and adaptors which can be removed by twisting/pulling. As a result, the hubs would rotate in place in a way that is detrimental to how a dragon staff rolls. 


If you have a 15mm diameter staff, the end tubes are held in place by 3D printed connectors. Twisting the tube will detach it from the connector causing the tube to come off the shaft. Also the repeated twisting will wear out the buttons.


DIY solution: You can secure them with tape as a temporary solution, drill screws into the buttons to make them secure, or order screw-connectors from flowtoys and drill them in yourself.


Other options: