Your experience with Rodney's tool will be greatly enhanced if you relieve the pressure of the glass on the dew wipes. There are two, (I believe 10mm) bolts on the top of the door that do that. The bolts will be obvious after you remove the inside door panels.
There are other methods to replace the dew wipes but I have used Rodney's tool on two cars and found it to be not that difficult.
Also I did not replace the two difficult screws. The dew wipe is still held in place securely and next time I replace them it will be a LOT easier.
If you find my advice useful, then please give me a positive rating, thanks...
1988 GT (Firebird Interior)
1988 Coupe (Daily Driver),
1985 SE (Project Car) Recent Addition
1985 Coupe (parts car)
Firebird Interior Installation Thread