Well, I found a source for the pins, and it's local to me, of all places--Ace Hardware! 0.047" (1.2mm) dia. by 19/32" (15mm) long. When I insert them into the holes I drilled, they barely protrude beyond the diameter of the push rod, and will easily clear the holes in the wing root rib. 32 cents each.
So which pins did you end up using? The "bobbie" pins or other? Enquiring minds want to know