[john70t]

I bought a 50' coiled big piece of wire from a box store late at night.
Spent a few hours running it to the street.
It had just a small spiral end. No cutter. All hand cranking or clumsily attempting to. A mess pulling it back out.
It turned out the blockage was at about 52' or so.

Roto-Rooter dude knew when to feed the line fast out, when to slow down and test, when to yank back fast many times to cut the blockage smooth.
A bit scary but they did the trick.