I was at the Celinder website and was looking at the summary of their strings. They have a nylon type string and this is what it says. "The CELINDER NYLON strings are flatwound strings with black nylon taper built on a steel core. They are particularly good for transducer style pickups, but work great with regular magnetic pickups too. Like the CELINDER CHROME flatwounds they are not designed for thru-body-stringing, but will fit all our 35" scale basses (toploaded)." My question is, since they are wound with nylon but have a steel core, how do they sound with regular pick-ups? Also, how does nylon feel on your fingers. My father has a classical guitar with nylon strings and I don't like them that much, they tend to "roll" whenever I play it. Would these do the same thing?