Tell us about yourself!
However, I should not omit my kudoes on a job well done.
A point....... Cinder blocks were given a trial after WWII and found lacking. They have not been manufactured in over 60 years.I imagine what you used are CONCRETE blocks. Concrete, not cinder and not cement.
While the weigh bearing of the shelves is a concern, a greater and often overlooked is the weight bearing of the garage trusses. If the trusses are made of 2x4's it is best to keep the weight low. Xmas decorstions, perhaps.
Tools + Supplies
Pasta Making Class
I am 74 years old ans have been using this trick for over 65 years. It does work grest but I think it helps if the blows are struck at the angle needed to s\put a light twist on the lid.