I needed to make some transmission cooler lines, so I decided to use that for
my initial test of the Koul Tool.  I inserted the -6 socket into the tool.
It didn't fit perfectly tight.  There was a little bit of slop, but having not
ever used something like this before, I had no idea how tight the fit was
supposed to be.  I lubricated the cone-shaped "entry" point of the tool,
where the hose will enter.




Next, I secured the tool in a vise:




I had recently purchased some -6 hose, which had a very sloppy cut from the
vendor.  I unwrapped the tape, and left the frayed ends as they came.  This
would make for a good "worst case scenario" test, since no one (I hope)
would ever cut their braided lines this poorly in a real-world situation.




I inserted the hose into the Koul Tool, pushed on the hose with light pressure
and began turning the hose inside the tool.  After about 15 quarter-turns, I
could feel the hose slide into place.  I used a flashlight to check the other
end of the tool to make sure the hose was far enough in:




Hose with socket in place:




Wow.  I was very impressed.  The entire process only took about 3 minutes.  I
did a few more, and those only took (including the time to cut the hose) about
10 minutes each.  I just used a plain-old hacksaw, since I didn't have to
worry about how frayed the ends were.

I was already convinced by this point that the Koul Tool was very useful, but
the next test really set that in concrete...