Semolina or Wad?? Ask 4 of us and you'll get 6 different answers! everyone has their favourite approach so it's really whatever works for you.

Same with the Triple 7 question. I use 777 because I find it less corrosive and dead easy to clean. Tac is right that 777 is more fussy about compression but I've never found it a problem.
Someone will be along in a minute to disagree entirely
S