I'm a Gibson guy and try to perform all my own setups. I'm a decent player, but a YouTube luthier. This was a very easy fix. The shop I purchased my Hummingbird from did a setup for me before I took it home. I feel the high E slot was a little overcut as there is always a slight buzz when played open. Bought this Nut Repair Powder and some thin Superglue. Used as directed, and problem solved! I just filed the slot down to where it should have been, and no more buzz. You do need a proper sized nut file for the correct width. But, my limited skills were able to make this repair on an expensive guitar without having to take it back to a shop. I highly recommend this product!