Just received this unit in the mail.
Seems really well built.
Have a couple questions:
1) what is the fine tuning knob on the sbh-250 head for?
2) do you guys tighten the hex nuts on the tripod to secure the head? I guess those little nuts are supposed to dig in to the bottom of the ballhead. Should these be used at all times?
3) do you keep the head on the tripod at all times?

