No probs, thx for the response. Printing is finished. Parts are dripping in. I have designed some tabs to make sure the parts glue together sturdy.
Wrt to the holes: Ok clear, the 1mm small hole is for the push rod and is not fully penetrating the hull on purpose. I have printed the nozzle and now understand that I have to manually drill also the hole for the '3D vectoring nozzle'. Clear, thx!
I will post some pictures once all parts are in and fully assembled