glad you like it
Having access to a printer for free was just a perfect opportunity! The other part was convincing the professor that they are necessary for my work, but i was lucky
For you now the parts cost, but the geometry is really simple so that reproducing them should be easily possible.
And you are right, you will need two of the connecting pieces for one unit. by the way i couldnīt come up with a better name for these things
This is what you need for one plane:
2x main carrier
4x connecting piece
2x aft base
if you print just one piece of every part you only pay about $26. thats a reasonable price in my opinion.