A few years ago, I found an old Gibson student guitar in the trash with no bridge. Up to last year, I took it up to purchasing gluing a new rosewood bridge on my guitar and (with some sanding and finishing on the top) it worked out perfect, except for one thing. During rebuilding, I noticed that the top of the guitar was a little unstable after I put steel strings on the first time, and as a result, I had to detune this guitar when I wasn't playing and when it was in standard tuning, the action was hard and unstable. The solution, the guitar needed light gauge strings, so I tried phosphorus bronze custom lights before switching to these silk and steels. The final result, I'm able to keep this guitar in standard tuning with the silk and steels on and now this guitar is good for playing folk, classical, and even some Gypsy jazz. I highly recommend these for the older guitars than tend to have harder action with the traditional bronze strings.