yeah i dont know what it was but the 2.5 i had to ride the tube to get a good shade and in turn ink was puddled everywhere constantly dipping and wiping. Then when i hung the needle 2.0-3 mm i got no saturation. It seemed i had to adjust how i worked to the machine rather than the machine working for me. then i traded for a RW and it just worked no if ands or butts. again it was more than likely on me why it didnt work as i see many love the 2.5. but dam that whole riding the tube and gliding the tube across the skins was new to me and didn't like it