I started using the SEA motor pen around the beginning of 2019, and it feels obviously better than some of the machines I have used before. I can usually do black, gray, and color tattoos without any problems, and it meets most of my tattoo needs. Later, I used an upgraded version of the SEA capsule pen until now, and also replaced it with a mobile power supply.
The 3.5-stroke version feels very good in all aspects. The drawings in recent years are basically made with this pen. Better machines bring a more relaxed and comfortable drawing experience, longer battery life, smaller skin lesions and better recovery effects.