So I've learned to play "Have Yourself A Merry Little Christmas" on my baritone ukes in the key of G (what would be C chord shapes on an ukulele tuned GCEA), but that key is just a bit low for my voice and I would prefer to sing this song in the key of A. I know I could use a capo at the first fret, but I'm wondering if it would damage the strings or the ukuleles to tune up one full step from DGBE. Would that put too much tension on the necks or the bridge or cause other problems? My baritones are a Pono mahogany, a Kamaka and a Mya-Moe, all with the strings they came with. Any thoughts? Thanks!