I'm not a huge fan of cr's unless it's against an aggressor you know will still pay you off. It's a huge show of strength that will let people get away from hands easier and if they don't bite it gives free cards (unless you have the nuts). I think it's better just to bet in both cases. Nothing you can do about the str8 flush.

Hand 2 looks perfect.

I like the check in the last hand. This is one of those rare times you fire two barrels and realize you just have to give it up on the river.