Why not just trim his nails? By the time you get around to gluing the caps on you could have trimmed his nails. Much cheaper!

Trimmed nails, 5 minutes a day of training on scratching posts, and scratching posts strategically placed throughout the home ensures no scratching.
Great advice!! Another thing to note is that it is SO inhumane, declawing is outlawed in Europe. I only wish the US would follow suit.