I own two of these machines, purchased for me by the one who apprenticed me as a gift while attending the Biggest tattoo show on earth in Las Vegas, and wondered if anyone else has used them. He could not remember any of the details given to him about the sliding mechanism in the back. I can take photos of the machines to show you what I am talking about if needed.
from their page:
http://coolinktattoosupplies.com/
Each machine is hand finished, individually initialed and numbered, and set up by Alan Dixon before shipping.
Alan's Cool Ink Tattoo Supplies
743 Highway 98 East
Destin, FL 32541
USA
Our machines have a slide on the back post, and when adjusted, alters the gap between the armature bar and back post. This flexibility allows the tattoo artist to change the needle pressure so the machine can be used as a liner, power liner, colorer, and soft shader. These are great ALL AROUND tattoo machines.
* Each quality tattoo machine is hand finished, no two are exactly the same
* Custom hand finished, initialed and numbered by Alan Dixon, tattoo artist with over 30 years experience
* Cast from solid brass, won't magnetize
* 4mm iron yoke under German 8-wrap hand-wrapped coils
* Front contact post features skull design hand-cast in brass
* Back post slide adjustment allows changes to needle pressure
* Use as liner, power liner, colorer and soft shader