This is my first clearomizer that I received as a gift. It is 510, it is purple and it is 1.6mL but that is all I know about it. I have never used one before. The threaded end screws off and the body comes out of the tank. It has wicks coming out of the top with a plastic cap and tip that comes off. I also have a separate metal ring that I don't know what to do with. Can you help? I have always used cartomizers and DCT carto tanks but want to try this out. I have attempted to contact the person who gave it to me but he has not responded yet. How do I fill it? Is it rebuildable? What does rebuildable mean? What make and ohm-age could it be? Ideas?