I had ordered an essex 4+1 bass neck (the maple w/ black blocks) to replace the neck on my sjb62. Once the neck was installed it was clear that there was some issues with the string height. The strings seem have very high action even though the bridge has been lowered nearly to its lowest setting. Refusing to tamper with it myself, I took it to a technician who told me that the only way I fix this problem is by shimming the neck. The strange thing is that the new neck is identical to the previous neck in terms of heel depth and cut so it seems strange that I would not be able to achieve the same string height I had before changing necks. Is this issue with the new neck something that can be resolved by adjusting the relief or would the shim be the most appropriate solution? Any help would be greatly appreciated!