With a 0.5 tip you'll have difficulty controlling the flow if you thin your paint too much, also your if you drop the pressure after thinning you'll get bad atomisation and spidering will be phenomenal, I would suggest mixing your paint with a transparent medium, I now use Golden transparent base and noticed that there is practically no tip dry at all, you can also use a good reducer or small drop of glycerine at the same time, Transparent base and/or reducer seem to have the effect of making your paint flow better, I've also noticed less problem with intermittent or broken lines.
.