Rules: Simple
Yes, you can use the stock for prints. No need to ask.
Yes, you can change the stock to fit your needs. I have no problem with your creativity. I hope I just fuel it.

Link back to this site so others can find the stock.
Note me, if you want me to see what you created. I will comment and fav your work.
Do not claim this stock as yours, Nor use it for brushes or tubes to put on other sites.
You can make backgrounds using this stock if you like.
Enjoy!
My art account.