I have a good example, I have a new guy in my squad and he was having trouble so I suggested he fly the spit 16 for a while until he felt a little more comfortable. Well a day or so later he asked me what is the second best spit to fly I said well you can try the spit 9, "OK, I had to ask why", he went on to tell me that he just didn't have enough perk points to fly the 16 anymore, I checked the ENY, it was 0. So I started thinking about it and "YEAP" he had been flying the 14 all this time and he really didn't realize it until I explained his mistake to him.
