Garage's extension roof fix

My detached garage must have been built back in the early 1940s.  At some point someone built a small extension when cars got longer.  While I could park my former car in the garage I can't park my pickup in the garage as the pickup is too high for the extension.  Probably around 20 years ago I added metal roofing to the extension as the plywood was bad and the shingle roofing was deteriorating and I didn't have plywood or shingles at the time.

I also caulked the gaps between the roof and wall.   The caulk lasted a while but is not really there or working now.  Instead of adding more caulk I nailed a small sheet of metal over the spot.  Actually two sheets of metal.

The longer sheet I got from Curtis as he has a scrap pile.  That sheet was a foot or so too short.  Then when I was riding my bicycle I saw a shorter piece laying at the side of the highway in the ditch.  I brought it home.

I bent the two pieces into an "L" and then nailed them into place.  It looks like it will work as I see no gaps anymore.

Donna says I should tear my garage down and build a new better garage.  But this garage works.  I use it as a storage building.