I cubed for about 20 years. Almost every day… for 20 years. Then; I seriously started realizing what a total waste of time it was. How watching reruns of the 3 Stooges was more constructive.
So; I quit exactly 3 weeks ago; immediately after I finally solved it.
I could have done it a lot faster if I had only noticed the little colored squares were just held on with adhesive.