I only wired a glass panel and changed the oil and spark plugs on my other plane (which is also an rv-9a that I bought). I flew 200 hrs in a rv-12 that I owned and loved, but it was not really a long distance cruiser, nor a mountain plane ( I flew out of Denver). I am really glad I bought both the quick build wings and fuselage as I expect to finish in 16 months or so, total time. The process is fun , and the plans complete. I sometimes make mistakes, and have to redo something, but nothing is really hard. I hope u take the plunge. U can always just buy the tail kit and see if u like it.