https://youtu.be/_KrP3djoLN8?si=uXl0YFOiDOt9nrBq
The stroke length on all my models is long, right around 5mm. I engineer these machines for stroke characteristics, not stroke length though. What that means is that my machines while they have a long stroke will likely not tattoo the same as another machine that has a similar stroke length. And you will always have more stroke than you need.