It's easy to convert, not difficult to load for and a blast to shoot. I have done three bolts: two by modifying the firing pin by adding an extension; and the other by using a RCBS decapping pin. My gunsmith charged $5 to drill the holes, and an extra $25 for the two that required modifying the firing pin.
Here's an interesting question - if you have several guns with rimfire bolts and you convert an extra bolt you have to centrefire, which guns need to be registered? The ones you intend to shoot with the centrefire bolt? All of them by virtue of possessing the bolt which gives you the ability to shoot them? If you then sell one or more of the guns with their rimfire bolt, do they get deregistered? And so on.... I sure won't be asking the CFC.