hey tugboat! thanks for your interest and no worries about asking questions. the professor in me loves 'em
string spacing is at 19mm and the scale is 34. as for positioning you have access all the way up to the 24th. tom is a master craftsman and between the body style and cutaway areas if you play up there it is not a strain.
there are side markers at 3, 5, 7, 9, 12 and every major interval up to the 24th as i prefer unlined finger boards. even if i didn't it would be sacrilege to cover up the african ebony figuring! this was one of my instruments my gf welcomed into the family as she said it was "pretty"
let me know if you have any other questions.