My question is: What is the extra pressure on the neck, body, bridge to pull it up to ADF#B, with the intention of leaving it there? What is wrong with a second fret capo, and relax it when it's not being played?
Hello William - Here's your answer:
First, this set is designed for C tuning on a 20" standard scale Baritone or D tuning on a 17" standard scale Tenor. In other words, you're don't "pull it up" to D on a Tenor - that's where it's supposed to be. If you tuned it to C on a Tenor, you'd be "slacking it", and most people would find the tensions too loose.
As far as the capo, we make mostly longneck instruments, and love to see people take adavtage of the versatility that comes from capo use. On most short scale instruments like an ukulele, however, the sound with a capo is usually not quite as nice as you get playing open. Ukuleles are not flamenco guitars, so to me a capo is something you use as a temporary adjustment.
What I'd say as to the Linear (low 4th) D tuning on a standard Tenor, is that this is where you want to be in the first place. There are reasons why so many people struggle with the "low G" note on a Tenor, and one of them is that it's borderline deep for the volume of that particular body. Some instruments can handle it, some can't. It's not a problem with D tuning.
Finally, this is, after all, "Ukulele Standard Tuning". You'll find most old sheet music written this way, and if you're not a fan of wound strings, this set-up is simply far and away the best you'll get for linear ukulele tuning on any sized instrument. Clear - well defined - no flabby, dull, boomy 4th string - perfectly matched to the volume of the body, and with a very pronounced "ukulele" character.
Update
I'd like to ammend the remarks about the capo. We now have in hand the new Shubb Ukulele capos. I had always loved these, but they were never made for ukuleles until recently. The soft material over the fretboard, and even more importantly, the pressure adjustment in back, means the minor intonation problems with most capos go away with the Shubb!