MockV,

Since you cut the hinge slots in the Stab and Fin oversize, you should pin them (and yes, round toothpicks work great) But for future reference, the toothpicks are not needed if you cut the slots with a razor blade, or the GP Slot Machine.

(Note: the pin in the hinging article is for centering the hinges and is removed after the hinges are in place. These have nothing to do with the pins we are talking about in this thread)