Quests. Some are factual, some mythical. I have one of my own: the quest for the perfect capo. Some say it doesn’t exist. I have a collection of a variety of capos. Some work well on some of my guitars, but not on others. With any capo there can be the problem of skewing the guitar’s strings upon application of the capo. Then there’s problem of the guitar staying in tune after application. And, of course, there is the issue of a buzzing of strings when the capo is applied. Thus, we guitarists have the never ending quest for the perfect capo.
There have been developments is capo design. One involves application of specific pads which correspond to the guitar’s fretboard radius. This likely solves the problem, but is impractical (I would never take the time to change the pads). Recently I read of the marketing of a new G7 capo in Acoustic Guitar magazine. The new capo is called the G7th Performance 3 Guitar Capo (clamping mechanism). It involves G7’s technology called “Adaptive Radius Technology” (ART). Per G7:
Revolutionary new active string pad infinitely adapts to match any guitar perfectly. The ART mechanism delivers unrivaled tuning stability by applying even pressure across the strings. Suitable for ALL ACOUSTIC and ELECTRIC 6 string guitars.