Curious about the turkey levers...The levers are Mafac, but the safety extension/turkey lever portion is made by Dia-Compe. I have a hard time imagining it would have come from France this way. Would this have been an after-market option, say added by a domestic LBS at time of purchase? Also, the pivot bolt seems larger than the pivot bolt on my other (non-turkey-levered) Mafac levers. If I wanted to remove the turkey levers, is there a simple way to convert back to standard levers, assuming I could source new pivot bolts?