I'm planning to build another instrument soon. Basically a tenor guitar only with a mando type body and four groups of paired strings. Does anyone know the formula for fret locations? I'm thinking of a 24" scale with a pin bridge. Mahogany neck, back and sides, redwood or spruce top, ebony bridge and 12 fret clear of the body finger board.

Ideas and suggestions are welcome. I'm trying to aacomodate my diminishing finger dexterity and stay active instrumentally as long as I can.

Don