Has anyone fitted these to these bikes ?

In the case of the solid axles, did you drill and thread them ?

In the case of the front axle with it's hex socket axle removal portion, how did you overcome this ?

I intend to fit bobbins on my bike and can see various places they will fit and offer protection, but am having a conflict of thought on the front axle due to the 12mm x 10mm deep axle removal socket that there is there. do I just drill deep, or thread the socket itself to take a m12 bobbin fixing bolt.