I cant think of anyone off hand... I am sure there are people out there who do it.
Give it a try I guess... just go very slow and make sure to use a flat surface and keep going at the same angle.
I wish there was a way to create a jig so that the CG could be mounted, you would measure the angle of the case and then adjust the jig so that it was at the correct angle... Damn that sounded stupid...
I know there are jigs made for sharpening knives, and that is what I am thinking of......... You clamp the knife in, adjust the angle and then you can ONLY sharpen it at that exact angle.
OR, you have a doner CG... carve that one down perfect, and then use that as a template for the good one. Lay the doner on top of the good one (once it has been perfectly shaped) use a thin point sharpie to mark the good one, and than sand it till all the black is gone.