---DO NOT BUY FROM AMAZON MARKETPLACE SELLERS: YOU WILL PAY MORE, WAIT LONGER AND GET A USED BOOK!---Aerosoft’s Twin Otter Extended is the definitive DHC-6 for Microsoft Flight Simulator X. It is a deceptively simple aircraft that is easy to fly, but difficult to fly well. It is, of course, a visual work of art but it is also a simulation of surprising depth. To appreciate the Twin Otter’s nuances, you need to take the time to explore it. The Aerosoft manual will get you started but it won’t tell you everything you need to know. This guide is a record of my own explorations, conducted over a year and a half as I built my Twin Otter home cockpit and then learned to fly it. It isn’t a complete work, it is what I have learned about the Twin Otter and about Aerosoft’s simulation of it. I am still learning, and I hope this will inspire you to do some exploring of your own.