You Wonder What they were thinking

Our back door hasn't closed properly for years. It all started when I loosened one of the screws that holds down the threshold. When we bought the house, the gutters were in bad shape. Water had dripped on to the deck and splashed onto the wood around the door and rotted some of it. I couldn't tighten the screw and the threshold had a little rise to it. The door stuck horribly on it.
I tried to remove the old threshold a few weeks ago.

One of the large screws holding it down was totally stripped. I bought a 'screw-removal' tool. That's basically a hardened screw with the threads going the opposite way. I drill a hole into the center of the screw, and run the 'extractor' into it. Using the drill and a wrench, I'm slowly turning the screw, when the 'extractor' snaps off. Now, I have a screw with a hardened steel core. I try grinding it out. Nothing.
I go through about a dozen dremel cutting wheels before I get it out.

Now, with all the screws out, I try to remove the threshold and it's as solidly planted as ever. Out of desperation, I use the dremel cutting wheels to cut the aluminum threshold in half.

While prying it out, I discover that the builder had run screws through the door frame,into the sides of the threshold. What fuckhead would do that?

After a lot of prying,and undoubtedly damaging the frame, I finally get the pieces of it free.

So today,with my new threshold, I attempt the install. Half a day of frustration later, I think, "Maybe I just need a bigger hammer." I basically hammer the new threshold into place. To my surprise, it drops in and looks great.

The only downside is that I didn't add any wood glue before dropping it in, so it's basically just wedged into place with no screws, no glue.

I'll have to figure out a way to inject some glue under it. Some other day.