The weight of the parts I printed are always about 10% lighter than the estimated weight by Simplify3D.
For the test parts I weighted W1=170gramms and F7=96gramms.
My parts have always been lighter than the weights given by 3DLabprint for their original planes, meaning its probably no problem if they´re a little bit heavier than mine.
The 2 larger carbontubes are used as the wing spar and should be in one piece. If you can’t find any in that length, you could combine 2 by putting a 14mm diameter tube inside the others and glueing them together. I bought the ones I used here: https://www.r-g.de
I weighted some parts I found. Every part weights about 10% less than shown by Simplify3D using the available Factory files, e.g. “W1” weights 170gramms and Simplify3D shows 190gramms.
I can create a spreadsheet for you, in case you don´t have access to Simplify3D.
Pls let me know if there are still any questions, I´ll be happy to help