Lining with rotaries is tough because there are so many options and variables out there and it's so subjective to how each artist tattoos. I've found that I like the Gen 8 and Ego most for linework of what I've tried. Nick's Abar rotaries are nice as well... It's all trial and error which is why this will be a useful forum for you I've traded so much and have got to try out so many machines it's ridiculous... Rotary Works are great machines just depends on how you tattoo that will dictate how great they line for you... Either way Welcome!!