Weathering the Storm Door

Storm door latch. Not shown: the spring that flew away.

I Google everything.
In the olden days, I would spend hours in the auto parts store, crouched down in a corner sneak-reading the Chilton's Auto Repair Manual, because I couldn't afford to buy one. I never bought one, since I changed cars as often as I changed underwear, and I would have needed a new manual for each. Sometime in the 1970's I was found out, and they Chilton folks started sealing the manuals in cellophane so they would have to be purchased.
Then later I discovered the public library kept a few auto repair manuals. They included instructions for repairing a 1937 Dodge, a Hupmobile, and all foreign cars 1960-1961.
I actually had a 1960 foreign car, and was thrilled to check out the manual. I rushed home, changed clothes, wiggled under the car and opened the book to the front ball joint page. It was completely obliterated by black grease, accented by thumbprints and suspicious brown lumps. I was on my own again.
Until Google.
Yesterday I tried to switch out the handle set on a storm door. Within seconds of opening the handle I saw a spring fly out and away, forever lost in the petunia bed. I had the spring from the old one, but after four attempts, the handle was not working. You see above a sketch of the Googled storm door handle. The spring, the only part I care about, is not shown, and it is not covered with black grease. So today I will return to the worksite, and assemble and disassemble the latch another 10-15 times until I accidentally put it together properly and it will work.