planet47 Posted January 27, 2014 Share Posted January 27, 2014 Lightening holes, lightening holes They are everywhere and I am sure that there are more to come in the scheme of things and in the interest of keeping statistics I am sure there are now around 300 in this structure of varying sizes. They have been filed and flanged and I feel I am nearly an expert on them. Link to comment Share on other sites More sharing options...
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