A little help with a S&W 686

Some of you may have seen this link I posted earlier of an issue I was having with a 686.
http://www.fasthavoc.net/linkedimage/guns/VID_20171215_175319.mp4

Well, I opened it up, and saw what was happening:

The sear is not extending over the trigger. If you let go of the trigger quickly, it extends properly.

Yes, I know I can pay for shipping and S&W will take care of it. I consider this to be a learning experience, and will do that as a last resort. The sear looks like it is in interference with the trigger under normal conditions. What force makes it "jump" up to clear the trigger? Just the Sear Spring? Manually manipulating the hammer a little will make it go into place and function normally.

I have not replaced any springs or polished anything.

Col. Harrumph said:

Before doing anything else, give it a good cleaning. Gummed-up oil may be impeding trigger reset.

Click to expand...

My wife is from Noo Hampsher. Lakes region. I exported her. Her Dad is still in Laconier.

OK, so I had to nod my head and say, OK, I'll do that. *groan*

First time disassembling a S&W revolver. Have done so with RIA, Taurus and Astra.

What a pain in the butt. But every day you learn something new.
Today I learned "Take the hand and the trigger out of a S&W at the same time." Dagnabbit. Is it wrong to say that Taurus' new design for hand spring is easier and maybe a little better?

I hate that curly little spring now. It is truly evil.

OK, disassembly done, no 2 parts left together except barrel, frame, and sights. Everything cleaned and lubed. I didn't see any bad machining, odd wear, or damaged parts. Got it back together....

Exact same issue. Oh, and I have new respect for Jerry Miculek and Bic pens. I'm going to buy his video.

Next idea?