I am using spectra-tex paint.. When I set my PSI @ 10, sometime it sputters and comes out in a rush... If I want to make fine lines, should I filter and reduce the paint? I didn't think I had to filter spectra-tex paint.. Everyone told me it runs great even through a .185mm needle.. I have an iwata hp-cs with a .35mm needle.. Anyone know if I can put smaller or bigger needles in it? If so, would I need a new nozzle too?