Ok - I just laid out (with paper tags and tape) a dual scale -based on my six string 25.5 guitar and my 25.5 inch scale dulcimer fretted 3 string. The # 3 fret is missing on the dulcimer scale - the number 5 blues is equivalent to the number 3 dulcimer - the number 7 blues is equal to the 4 dulcimer - six dulcimer = 10 blues and 8 dulcimer = 12 blues -=
I just laid the dulcimer fretted 3 string on the six string factory (same VSL) and made the comparison.
I am still lost on this - I think the blues scale is based on chromatic and the dulcimer is diatonic ?? Anyway # 3 blues is definitely missing and the rest are numbered differently if my thinking is right - Thanks for the reply !!
Your frets now are really for the minor chromatic scale -- the stock minor blues scale would include the sixth fret (sharp 4 / flat 5). You could probably get away without it, or plan to bend the fifth fret note (or slide) to get it.
Note as well that many blues folks play a flatter-than-chromatic minor third: your layout doesn't leave you the major second to bend up for that, which means you would need to play slide to intone that note.