Martin is turning out some gorgeous sounding, and looking, work. Here is his latest C 3/4 set. 

http://martinpreshaw.com/gallery/c-3-quarter-feb2010.htm  (Slideshow)

http://martinpreshaw.com/media/feb2010C3-4set_01.mp3  (Audio Sample: Nice!)

I just got tenor and baritone D concert regulators from Martin and I must say that they are really nice.