as tight as you can get with a 1/4 drive wrench.
anything bigger and youll snap them.
they dont have to be mega tight - just a drop of loctite and nip up.
You do not have to say anything. But it may harm your defence if you do not mention when posting something which you later rely on in quote. Anything you do say may be ripped to sh*t.
Best not to use a torque wrench as your likely to snap them with the extra leverage Just tighten up in a criss cross sequence a bit at a time until you feel them tight enough. Just be wary that they can snap quite easily, it's all about feel really and knowing when to stop.