OK, here is the string method in pictures!
I use gorilla string (fishing line with a cord, kinda like fly fishing line
) thru a 1/16" hole drilled thru the switch and thru both sides of the fuselage. Once I pull the strings thru the fuselage, I tie 2~3 knots in it (in a bunch
) so that it won't pull back thru the fuselage and then trim and melt the ends of the string with a heat source so they won't Frey. I align the switch so to the left is always on, and to the right is always off when looking forward toward turn one..