I've had the Pulse Watson since 2006 and love it. It can handle whatever needle you throw at it. However, I dont like the copper components. My duty cycle fluctuates between 48 and 52, but when i move the rear part of the clipcord to contact the spring clamp, it smooths out. Thats still after new springs/contact screw/clip cord. It oxidizes rather quickly and needs frequent cleaning. I'm going to change the copper over to standard steel. If you order it from Pulse, you can have them change it for you right there. Pulse rocks man, you wont be dissapointed.