I've recently reacquainted myself with my classical guitar, which I generally play occasionally in a very un-classical way. I think I would play this instrument much more frequently if it had strap buttons. How does the forum feel about adding strap buttons to a classical guitar? Will it significantly diminish the guitar's value (the instrument is an Alhambra 11C, which is the top of their production line not made by a single luthier)? Has anyone added buttons previously?