I find it interesting how we use vim so differently. I'd never type "10yy", I'd use "y9j". I never use "10G", I use ":10<CR>" (<CR> = enter for those not familiar). Similarly, "0G" is "gg" for me. Call me a notepad user, but that whole second snippet for me would be "ggV19j>" followed by "." until things lined up correctly. Similarly, the third would have been "V14j:s/a1/A1/g".

Nit pick: "q selects register q. A buffer is a different thing.