!Important notice: although this thing works fine for me, I wouldn't recommend you to try to install it on your plane. It might cause more problems with reliability.
Lock Pin for HobbyKing Sky Eye Tail
This pin was designed for HobbyKing's Sky Eye planer: http://www.hobbyking.com/hobbyking/store/__41322__HobbyKing_174_8482_Sky_Eye_EPO_FPV_Glider_w_Flaps_2000mm_PNF_.html
The idea is to avoid gluing tail into fuselage. I liked HobbyKing's Bix3 wings pins that locks them tight, so I've made similar to my planer's tale. Please see photo for place where to drill 8mm hole
4\25: pin itself was made with mistake - projecting part should have been rotated 90 degrees. Also added sketchup file for your modifications
4\26: printed on makerbot 5th gen - pin gets into washers too tight, I will update files today evening and will change inner holes in washers