Seems there are wide views on the “Hilary Hole”. If I had a SW with lock, I could stomach it if I knew it wouldn’t malfunction. Some guys grind down the “nub” so it can’t block the hammer rear movement. That works. Some guys remove the piece containing the “nub” and plug the key hole. If you remove the flagged (“locked”) panel there will be a rectangular shaped slot on the left side of hammer when viewed from the rear in normal shooting position. Will the hammer stay in plane with that slot open as the hammer moves thru it’s stroke? I guess the trade off is you create an opening for debris, water, whatever to enter the pistol. On the other hand you can save the flagged piece with nub intact so you could put the pistol back like it was made if you needed to sell it later? I guess you could grind it off (Dremel) and always order a replacement piece with nub attached if you desired to sell it “as manufactured” and not create the open slot, assuming the hammer still functions properly with slot open. Are these the basic thought on which way to ensure no malfunction? Some feel it won’t malfunction as long as the return spring works but apparently is doesn’t all the time. I thought I read the more likely “inertia induced failures were magnum pistols with light frames”. I would thing a standard 629 would not fit that category but I have read about failures in them as well.