I need to match-drill a few 1/2" holes thru my center section spars (see photo).
Is there a way to do it without a drill block?
thanks
Jerry
Is there a way to do it without a drill block?
thanks
Jerry
![halfinchhole.jpg halfinchhole.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/25/25218-halfinchhole.jpg)
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