Hi, I am wondering if the Eagnas Easy-3's swivel clamp has a spring-assisted base like the ones in the more expensive models (Eagnas Combo 910, Alpha Axis Pro). Looking at the pictures on the Eagnas website, the swivel clamp base looks similar (not identical) to the other spring-assisted bases but their website does not state specifically that it is spring-assisted. This feature is important to me since I hear it saves a lot of time. http://www.eagnas.com/easy3.html I'd also like to know if the K-shaped supports (like the ones on the Combo 910) will work well with badminton rackets (I string up to 28 pounds). Thanks!