I got it done. Pleasant build and a lot of parts so it took some time too hence the two day silence in reposting. I added few bits of my own to the build and continue doing so. I'd like to show fuel lines and some electrical wiring too.
Next step is to make so support structure for it. When that's ready I'll show the engine with the vessel.
Scaling the model down to 70% of it's original size took me somewhere near 1/45 and that is the about scale I've been holding in my mind (if I managed to get the maths right - please correct if not right).
Once again thanks Mirco - would this by any chance be your model?
Best Regards,
Tappi