I ordered some axle sliders for my little X300 with the hope of making servicing the wheels (spokes) and other stuff easier. The only problem is that the cotter pins for the castle nuts on each axle won't be able to go back in on the slider shafts are installed. I have researched a self-locking style nut that would allow the pass through, but haven't come up with much. I imagine someone else has already put some of these in and any advice would be appreciated!