Sepp,
I didnt have much luck with the tool, it wanted to bind on the locking strip and I installed the chrome locking strip, the tool wanted to dent it an was kinda a hassle, I had the best luck with a small flat tip screw driver & a set of those dental type pics, the set I have has several curved tips on em they worked great for gettin in the strip and working the lock in,now I did mine with my brothers help, we took our time not to scratch the new paint.
We did it as follows, my brother stayed a few inches ahead of me applying pressure and keeping the lock strip straight while I worked it in, I have an after market rear slider wich made for a pretty tight install if it was flat glass it surely would have been easier.
and took us abought an hr to put in all 3 back windows.
Temp was around 70 degrees.
Tim
P.S. a little bit of WD40 sprayed in the locking strip track helps tremendously!