Will there need to a thrust tube built into the nacelles, or can the nacells work the way they are made? I have held a Dynamax fan unit up to the nacell and the forward lip mold perfectly into the edge of the fan, but like some of you, I am concerned about the weight. This fan with the Skorpion motor seems robust (have not run it yet), but it also feels heavy. My guess is that it will weigh much more than the Wren 44, but again I am looking at about 80% more thrust.
I may have to look at Tams EDF unit and price it before going with these two.