I have new pearl bass drum spurs. My old spurs only needed 3 holes for mounting. The pearl spurs need 4. My only concern is weakening the area where the spurs go due to drilling new holes around the old ones. Anyone have an experiences with this? My kit is a custom Epek out of regina saskatchewan canada. I am not sure what kind of spurs they were shipped with. Anyways any help opinions would help. I am comfortable with drilling the holes I'm just worried about the shell becoming weak.