Gordon,
yes I have had an operation on my foot and have been workshop bound ! All done now in both senses. Waiting today for some decals from Ralle @ Tailormade which I know will be good as I have had all good stuff from him in the past, I will fix these tonight and then a little dirty down I think.
The fan as you can see is in the rear bulkhead and has a Lehner 2250/13 wind. The controller sits in top of the ducting in the nice little space which seems made for it with its own airflow in/out (plus it own fan). The 10s 5000 pack is in the ideal position and the leads reach the controller just right. Interesting to see what if any the quicker reducing tube has on the push as with the fan further back the air is squeezzzzeeed quicker to the rear pipe exit. I imagine not a lot, and I sure there are some who can work that out on the back of an envelope before the finest hour. For its probably Mr J Palmer who will determine whether it flies or dies!