I'm preparing to do a button patch on a violin that was repaired before. Someone had drilled holes between the block and back surface and inserted a piece of wood to try and secure the neck and previously broken button. I could fill the drill hole grooves at the ends only or completely for the one on the left, but am thinking if I make the patch wider at the bottom I'll only need to do the ends that extend beyond where the block will be. Would you choose to do either of these shapes or something different? In the 2nd diagram I would adjust the straight lines to curve outwards a little. I calculate it would reveal about 3mm new wood from the outside at the corners of the button. Thanks for any opinions.
Hope the pictures come out right. Havn't uploaded anything for a while accept a test.