3 demerits for improper use of the term “drawbore”.
The drawbore pins, if installed correctly, do indeed tighten the mortise and tenon joint. But since the pins are the only point of connection, the wood is still able to move within the mortise. Glue on the other hand indiscriminately locks the tenon within the mortise which leads to expansion cracks.
Artisan Woodworks of Texas- www.awwtx.com