Bathtub Drain Wrench on the Fly

Installing a new bathtub during the week end, I only needed to screw in the drain.
I had already experienced breaking the old drain when i removed the old tub using needle nose pliers and chanelocks.
The tub's installation manual also mentioned not to tighten the drain too hard or else risk cracking the fiberglass ;8(
I didn't want to go out to buy a tool i'd only use twice maybe!
So...

- A saw, I am fortunate enough to have a compound saw but a hand saw would work as well.
-Chanelocks
- About a foot of 1" PVC
-Plumber's putty
-5 to 10 minutes

Cut 4 evenly spaced 1' slits on the lenghth of the end of the PVC. They should be spaced to fit in the drain.

Check that it fits snugly and make the necessary adjustments

Before you start screwing in the drain, don't forget to make a nice ring of "plumber's putty" between the tub and the drain.
Tighten with an adjustable wrench or chanelocks and clean up the excess putty and voila.
I could have made a more elaborate tool by adding a cross bar instead of using a wrench to tighten.
The size of my drain is pretty standard and 1" PVC was perfect. You may need to use a different size for your own customized tool.
I am also aware of the fact that there is a tool that does just that. However, this took less than 5 minutes to make and that beats the hour it would have taken to get out, drive to the big box, fork out $10, drive back, use said tool just once.
Your questions and comments are welcome!