I now have 2 black duck visits under my belt with my 35kg beginner rider son riding around no jumping, and I am concerned about some wear that must be happening in the front forks? If you prop the bike up front wheel off the ground and grasp the front axle you can toggle the bottom fork sliders backwards and forwards by a small amount, i.e. they are wobbling in the upper tube housing as it the upper slipper is worn. Has anyone experienced this? also is there any info on how to strip them etc.?