Been seeing alot of planes here that are virtually the same...same paint, weathering shading, ect....only thing thats different is the isignia or call sign.
Granted, if you need a batch for a special event, it's easy to do.
But for main arena submissions - I would suggest you do one skin and leave it be...or just use the panel lines and design a whole nother bird with new weathering camo, ect.....
Keep some variety in it and remeber - it's not how much you turn out - it's the quality of the work that matters.