As Geedublya said, just leave them on but if for any reason you do want to take them off and swap back to the OEM ones, you can drill the OEM rods out slightly to make them much easier to take on and off.
Older versions of the fitting instructions included this note:
1 While you have the original rods off, you can open up the holes a little to make swapping the rods a little easier. A 9.5mm drill bit will open it up sufficiently, whilst still giving a snug fit.
David

