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MUHAMMAD NUR FARHAN BIN SANIMAN
3 years agoI echoed the info shared by Paul Holloway. In summary, SDH is better. You can find the technical explanations in his posts below: 1) https://www.linkedin.com/pulse/notches-vs-side-drilled-holes-chapter-1-echo-paul-holloway/ 2) https://www.linkedin.com/pulse/notches-vs-side-drilled-holes-chapter-2-practical-effects-holloway/ 3) https://www.linkedin.com/pulse/notches-vs-side-drilled-holes-chapter-3-crack-paul-holloway/ Farhan
 
        
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