I want to get one but really don't know everything about them. I got a cheapo testors one from walmart. Do you have to thin the paint before you spray it? I usually use testors paint. Can you use any compressor? I have a relative that has a 5(?) gallon compressor. Does it have to be in any specific psi range? I thought i read somewhere it needs to be between 20psi - 22psi. I don't want to get a really expensive one because I don't build models like I used to, but mostly for my tanks. Thanks.