I did that on a stainless SP101 when they first came out, but I did not go the full route to remove the SA notch or whatever you do to make it DAO. That makes it tempting to try to cock the spurless hammer in some situations, which is a sorta dangerous action. I think smiths convert the guns to DAO when they bob the hammers due to liability. "I was trying to cock the little hammer and my thumb slipped" is all it would take to get some smith a nice civil lawsuit, I would think. If I were you and had a little money socked back, I would not alter that gun, I would buy an additional bodyguard model, if SA cocking was required, or a hammerless model. Two is better than one! And I am not so sure that a new hammer would just drop in and work perfectly in a gun it was not fit to at the factory. I tried that with putting a wide trigger in place of narrow on a K frame, it would function, but pretty horribly. Smith revolvers are not exactly like a 1911 or some other guns that parts can often just drop in easily, there is more hand fitting and trying in the older Smiths than you might expect. The new ones that are CNC machined might have more interchangeability these days, I don't know.