I purchased a used set of EP Weich on TB awhile back. Seller claimed (I believe) that they were 6 months old. I put them on a Kay originally and didn't care much for them at the time since I was using the bass for swing dance gigs and jazz gigs. Went to Superflexibles and really liked them. Anyway, purchased another no name old ply bass and put the EPs on it and really love the sound of them on this bass. If I had any complaint it would be that I wish that they had slightly more tension. My question is- do these strings lose some of the perceived tension over time? If I buy a new set, will they be a little stiffer? I know that-like most strings- they lose some tonal qualities so a new set would sound better yet. Thanks for any advice!