re: Stanley No. 59 Doweling Jig

For panel builds, you don’t need anything more than biscuits. They don’t add almost any strength, but they’re great for alignment. Honestly you don’t even need biscuits if your boards are milled flat and true, but if it’s a large panel it’s nice to have some alignment ‘helpers’. 

Dowels are really better used to add strength…they’re kinda a pain in the butt just for alignment, IMO.