I have a gen 3. It is ready for it's maiden flight just waiting for the weather and my work schedule to cooperate.
the 1/6 is not available with the leading edge flaps even though there are pics on the site.
I also have a thread on the issues I had with this model. There were other issues I had that are not mentioned is my thread.
depending on which engine you want to use and if you want to use a bypass, there is another modification you'll need to know about.
pm me if you want more information.