Hello Snicks,
Good to see you back. I think plans for a nozzle holder would be helpful for a lot of us. I would be very interested in seeing your design.
In your experience, are you able to run 100% waste oil, or do you mix it with HHO? A friend of mine just built a heater block and was getting quite a bit of smoke at 100%, but at 75% it was looking pretty good.
Thanks for your willingness to help and share.
Russ