Yes, I did forget about this. I didn't reply right away because it's a lot of questions
Anyhoo.... as you saw, I don't check raise all that much, and when I do, it's on the turn. When there are multiple players in the pot, my check raises are very position dependent, depending on what I am trying to accomplish with them. Examples:
1. Say there are 3 of us and I am UTG with a vulnerable hand (TT overpair, for example). If I think Player 2 will check and Player 3 will bet, then I will check raise to eliminate Player #2. If, however, I think the player to my immediate left will bet/raise, I would lead out and let him raise to eliminate Player 3.
2. Same 3 players, but this time ,I have JdTd and the flop was As9d8d. I have a monster draw. Here, I want to build the pot, so I play it exactly the opposite. If I think Player 2 will check, I bet out and squeeze him. When Player 3 raises, I can reraise and really build this pot. This is especially good with even more players in the hand. However, if I think Player 2 would bet/raise, I check raise, because I don't want him driving out the player(s) behind him with a raise. Make sense?
I don't know that that really answers your question, but that covers most of my flop check raises. Heads Up, I usually wait for the turn and do it with very strong hands.
I bluff checkraise on the turn very rarely. The only time I would do that is with a sick looking board that I'm almost certain my opponent missed. It's dangerous too, because when you get reraised, you're done with the hand. And it won't work against weak opponents. They will gladly call with their KJ here. I really don't do this much, but I will do it against certain types of players.
As for your last statement/question, I'm not sure. I'd like to think I'd do just fine at 1/2. In fact, I think my numbers would be much better there, because my advantage (making less mistakes than my opponents) would be even higher. I don't know how you would do at 5/10...