Most of my time was spent researching how to buy the moulding and, when that hit a dead end, how to make it myself.

The actual making of that bolection moulding didn't take too long. I set it up like a production job: maybe 90 minutes to make 200+ feet of it. Actually, using the finished moulding profile as a template to set up the router, I made the extra eight feet I needed in about fifteen minutes.

I haven't filled the nail holes yet. That's something I do after I stain, just before the final finish coat so I can color match the fill, which invariably won't stain the same color as the wood. But I usually rely on glue for exposed trim work like this and just use a couple of thin brads to hold it in place. Sometimes the staining process will swell the wood enough to hide those brad holes without any fill.

I only make small mouldings like this when I can't buy them prefab. Unless you have access to some really cheap raw lumber (which I don't), it's usually cheaper buying prefab than cutting it yourself.