Thanx guys.
Well, here some updates:
I reinforced the inner sides of the side-tubes-coverages (what a word!

) to achieve a lil bit more stability in form and a certain "thickness" necessary for an accurate look. I also added some innerstructure for the part between the tubes to lock the shape.
And I finally drilled the holes through the maintube for the thrusters axis, which will stay moveable (but not dangling

) so the thrusters can be positioned in any desired angle.
Most work went into the frontplate of the mainbody.
Well, I know it doesn't look like much, but it took me ages to get the shapes and measures excactly to the blueprints. It contains the main front plate, another one which sits on the mainbody as backside and again I filled the gap for stability and equal thickness with two stripes of cardboard.
The picture of course isn't showing the final state as I only testfitted the part.
Also, let it be said for the accuracy buffs out there; I know the frontplate is also curved "into" the base. That I will do later after completly finishing the mainbody.
Next will be the upper and lower caps of the side tubes, before I'll "close" the mainbody finally.
As from tomorrow university starts again, progress will be slow.
However as there is a trooping event for the DVD release on November the 5th, I set that as deadline to finish the JP. Hopefully building will be finished in two weeks, so I have still a week for the paintjob.
BTW: I'm finally official member of the 501st.

So from now on it's BH8877 8)