When you do a trade like this , do you build both at once ?
I usually build both at the same time.. Mine is the 1st one that I do a step on, then work on the 2nd plane at the same step. That way if I find anything I don't like on my kit, I can change it for the customer's kit. Well..actually I do about 3 or 4 steps on mine, then turn around and do the same on the customer's with any mods that I can see would make it better.