The ESP Guitar Company

hello, i have recently taken ownership of an esp eclipse 2 standard vbk i love it but having some huge tuning stability issues, also when fretting lower notes they are going sharp, i have looked into this and there are alot of people stating it is a NUT issue. im using standard 10-52 tuned to either eb or straight d, i have looked at the nut groveds on the bone nut and they are virtually none exsistant,

rather than modify the exsisting nut i was thinking of going the tusq route, does any one know which nut i would use as all the ones i can see are gibson, epiphone and the state normal and xl,

any help would be awesome.

cheers