This comment helped me so much! Thank you! I had a few people mention better balancing and was trying to think of a way to do that elegantly and then when I read this with tetris and you explaining how it uses all pieces 2 times before a number can appear again it just clicked with my brain and is such a good solution. I raised it to 3 numbers appearing before re-shuffling and am afraid it's still too easy now but will keep experimenting. Anyway this helped a lot -thank you again! :D