I probably spent a couple of hours with it at least, not hurrying at all, I watched the whole video clear through, starting and stopping as needed, which wasn't much because he was so detailed. The only things I wasn't sure about that he didn't show in great detail (liability?) was how much to polish the sear, so I was guessing at that, having never done anything like this before, never even really had a revolver apart. My GP100 was a little different than the gun in his video, I think a few parts were shaped differently but no big deal. When he says take it apart under a rag to prevent a spring from flying, well, that's pretty good advice and worked well. And it all went back together very nicely. I think I could do the next one in under an hour.
I've taken an SP101 apart a couple of times and because I'm comfortable doing that, I'm guessing 1.5 - 2.0 hours...hopefully!