Now assemble the side
straightener at the upper
deck with hex round M2.5x4,
and solder all of the wires
before we cover the lower
deck.
Now we can cover the lower deck
with hex round M2.5x4.
Then use the hex M2.5x12 to
lock all the angle arm clamps.
Then assembly the
undercarriage with the
landing gear, the M2.5x6 is
for this purpose.
6