Great piece brother. Changing strings is something that always scares me. For some reason I am convinced I am going to do some irreversable damage to my guitar. That video makes it seem pretty simple. I do have a question. I have been using the Ernie Ball regualr slinky's. Do the Cobalts make that much difference. I was thinking about trying them on my ESP with a Floyd Rose but my guy at my local shop said he would have to change the tension in the springs if I went witht he cobalts and I wasn't even sure what he meant by that or if it was a good thing or a bad thing?