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Upper wing attach fitting

dc8mech

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Morning Folks,

Bit confussed about the front and rear spar center section fittings. I take it there are 1/4" holes for the spar attach part, the upper part. Then there are 5/16th holes for the rear attach fittings only, lower part? and no 5/16th holes for the front attach fittings. Just need to measure twice before I drill once and have to make little parts from big now scrapped parts. Erich
 

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