I quite like the check behind line actually, it certainly protects our stack and protects us from making a bad decision if raised.

I disagree about not ever getting 3 streets though micro. A passive staiony guy at 20NL 6 max will easily call 3 streets with 78 89 99 1010, I do find thin value betting profitable vs the less aggro stationy type of donk. Obviously we can't be sure villain is this type, but I typically go for a lot of value until I see they're decent enough to fold at 20NL.

I'm also not sure we should be giving this guy a free card to make his 2 pair, oesd or gutshot on the river. I think this board is pretty drawy in relation to a standard calling range out of the blinds (suited connectors and pairs) If it were something like 2 4 7 9 r, I like your c/b line more.