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47. The servo frame is 1,5 mm higher than the wing spar. The
planking later one will even it out.
48. Rib No. 1 in a right angle to the wing spar.
49. Some ribs are higher than the wing spar. Also this part is
evened out later on by planking..
51. The top planking is fixed with tape.
50. Start with the front lower planking. To do so, the plan should
be fixed to the building board.
52. Damp balsa is easier to bend.
