It is near impossible to diagnose over the internet for most issues. One thing that comes to mind for me is for you to wire inline an L.E.D. light to your magnetic clutch SC circuit. I have done this, and velcro'd the light under the hood lip on the drivers side so that I can actually see when the SC engages and disengages while driving. It lives there full time. You can then see precisely when it does its thing. I used a nice little green light for GO! The magnetic clutch is either engaged or not engaged; it typically doesn't slip. But check your spacing between it. Any slip that occurs is usually the Serpentine belt slipping from pulley, causing less boost. Another way to monitor is to have a boost gauge. It lets you know the psig at all times, and can let you know if you have an intake leak or not. But you need to know what the boost is with no leaks before you can see whether you've acquired a new leak. You're giving us a seat of the pants feeling that you're having less power. And you're telling us the power is low at "low speeds". That seems normal, but it could be many things though. Belt slip occurs when pushing it real hard, not at low speeds. Regarding video; keep searching. But it basically tells you less than I've already shared with you now.