uhm i dont wanna rewrite and repost so i just post the link to my blog, please waste the click and comment here.
http://www.roughedge.se/blogg/2013/03/09/first-attempt-spray-nozzle/Issues:
1) Spray pattern is onesided not uniformed.
2) It blows out o-rings like a motherf***er
Questions:
1) should the needle feed part be smaller its 6mm od, with a 3mm hole that runs upto a 1mm exit. if it smaller the bypass channels could be.. well better.
2) I think i made this in the wrong order, doing the bypass channels as one of the last steps. It created some issues with internal sealing.
Please comment.. =)