Hi , i notice on the vlad blad they get hot after around 10min and you have always to retune it because the power is breaking down. On the steel version of vlad running very nice, but are 230 to 260g !
I can really recommend the skinductor Alu Coil - they can run from very soft to really hart like you need and can use from 3 to 25 needles. I have try to 19rl. Its vibrate very less and dont get hot after hours non stop power.
Very lightweight. In the moment the best alu coil that i have try and use and i have a lot of coils and rotarys. The skinductor is very similar to a sidewinder by the way