Feedback on levels 10 476 - 10 520

I like Johnny's videos even if moves and format have changed because sometimes you can see what to clear first or something you missed that might help you get down to few enough moves you can booster your way out. I was just checking 10476 and Johnny had only 3 more than us at 21 (and he could have done it with 21) except I do not know how many tries he took before filming as he had 3 CBs appear very early on by chance. The videos also give us proof how greedy King has gotten to demoralize us.

I am stuck on level 10512 - help and tips would really be appreciated xx