So, I recently bought a MIM fretless, build in 2001 (serial is MZ1...). I want some more relief on the neck, so I decided to adjust the truss rod. Now, the wrenches I have don't match the headstock nut! What should I do? Is there a way to adjust the truss rod with another tool (a regular screwdriver?). My wrenches don't match the other screws on the bass either btw (bridge and knobs).