The ESP Guitar Company

Since this is my first post on this forum I should probably begin with saying hello. Hello. I recently bought a V-500 and want to change the somewhat crappy tune-o-matic bridge to a TonePros. But does anyone here know what the diameter is of the post-holes on the V-500 bridge? TonePros T3BT model has 6mm diameter and the T3BP model has 4mm, and I am unsure which one is right. And I don't have access to the guitar at the moment.