A .5mm nozzle is a fair sized nozzle and with wicked it should flow straight with no reducer. Also with it being a siphon feed airbrush you generally need a little higher pressure to pull the paint from the bottle so if you are working on a hard surface I would suggest a slight reduction of 2 drops paint to one drop reducer. Also back off the surface a bit while using the lowest air pressure you fan get away with to get a flow of paint with out stippling on you. Another thing is with a eclipse you need a real delicate touch when working close to a surface for fine lines. This is whey a lot of artists work large when working with a larger nozzle. Working on t shirts you wouldn't have this problem with a .5mm needle. Also I noticed the paint mainly streaking in one direction which indicates your pointing the brush at a slight angle rather than straight on. This is fine if you are compensating for overspray. This causes the paint to do what's called skating across the surface.
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