Anyone have any info on regulators and moisture seperators? I need this airbrush thing explained to me like I am a three year old. I know the difference between single or double action, but that's it. I don't even know which is better for this work...and I don't know what size tips/needles I need. I was lookign at the Paasche TG-SET on http://www.coastairbrush.com/products.asp?cat=97. I don't know if this has everything I need or do I have to buy other attachments for heavier work? I hate not knowing something....teach me.</p>