As with most things if you study them and then look at what they do you can generally get it right. When you think about it the sharp edge has to be on the down/bottom side or it will not cut. Having spent my life in aviation however has taught me that if something can be put on wrong it will. Boeing made many parts that were purposely made to fit one way only but creative mechanics found clever ways to bend, twist or modify them to install them wrong. There are times however where things like special washers go in a certain order that no amount of logic will determine the correct order. I believe we have all made mistakes on our Cubs so it's great to see another owner make them too!
