Hi Deirdre,
Trust me, I have neither the knowledge nor the expertise. I'm only learning as I go. But what knowledge I do have is borrowed from everyone on the board here. If it wasn't for their encouragement, I doubt I would have been able to do the half of this, that and my bull-headedness that makes me go and do it anyway and see what happens. If you don't have the equipment, I bet someone here would lend you it and help you, me included.
Bill.
Astronomers do it with the lights off.
  