Ladies and Gents please let me introduce you to The “GUVNOR MK 2.5 LITE”
With a massive 6.5mm Stroke and updated geometry 
This is my go to, super zippy power liner for 9RL’s and up.
I worked closely with a high end Swiss motor manufacturer to create a custom specification “through shaft” motor specifically made for this machine only and the result is amazing.
This machine features our patent pending “Flexi-Cam” system, Side mounted both sides of the machine to spread even pressure on the front and back high speed preloaded bearings that are incorporated within the motor.
This is, in my opinion, the single best machine I have ever personally used for larger groupings.
It’s geometry along with the “flexi-cam” system combined with the finely tuned “hit” at the bottom of the stroke make this an out of the box, no nonsense 6.5mm stroke machine, with absolutely ZERO adjustment needed your end. Just plug it in and get to the part you love most. The tattooing. 
Oh and did I mention, you can use your standard needles AND carts, with no adjustment needed?