Dean,

Thanks for that, I love the datron machines they are great, I have not looked closely at the accessories but the coolant head you mentioned looks cool I just checked it out.

I had a word with my friend who is building this with me who also designs all the electronic wizardry in our other projects and we are going to have a crack at something similar. I have a bit of background in pneumatics so I am hoping if we put our heads together on this we could come up with a neat solution that maybe others could use as well.

so in terms of the fogless mister am I right in thinking there is an air supply that can run independantly and the air supply also feeds a pressurised container (regulated) full of coolant which has its own control valve to allow the oil to be introduced into the flow?