Part 20 is strange. As i was following the tutorial on making the landing gear, all of a sudden there was an extra bit apeared on the strut and the part that was sticking through the circle at the top had gone ? I just modified mine to make it look the same, but they are not part of the tutorial. Just thought you might like to know... Great Tutorial BTW... Im not complaining, I just thought you may want to know about stuff like this