Quote Originally Posted by Philly View Post
I use these cheap jobbies: 8x8mm CNC Motor Jaw Shaft Coupler 8mm To 8mm Flexible Coupling OD 20x26mm # 02 | eBay

even bought a spare set which I haven't had to use :)
I was gunna buy arf a dozen of these for emergency's 8mm X 8mm CNC Flexible Jaw Spider Plum Coupling Shaft Coupler D 25mm L30mm | eBay