I have done most of the OOOP's out there. Built several one sided planes so I ended up with two planes, built (2) of the same wing and again ended up building a second plane. Glued my fingers so well to the plane I broke the part getting my finger loose. some how I have glued the trailing edge on upside down. Built the mounts for the retracts backwards so retracts moved towards the tip when retracting. Glued dihedral brace in upside down, Mounted control horns backwards. forgot sheer webs, found out after second flight, rekitted. mounted servos to high and wing would not bolt on. mixed up 3M77 with a can of 3M90 spray when sheeting foam cores, Once mixed a can of 3M silicone with 3M77.
So yes I have done my fair share of #($(*$$*(#*@*)$)_$*&#^!(&@)# Blunders.
Buzz.