I recently got some CK wheels through STW, and fitted them to my 66 with some Fun Bolts. Trouble is, the bolts only undo one side – the through shaft turns when I try to undo the "stuck side". I've got them off now with the help of a monkey wrench, but this seems a bit odd – any ideas before I return to the retrograde step of a standard QR? Taking a wrench on the trails in case of a puncture would be frustrating.