Yep the groove works well. I used a rat tail file to make the groove. Since in about a week the groove gets so deep, and you can't see the bands, from the pressure from the elasatator bands, I simply put the doe up on the milkstand and rolled new bands down in the groove each week. This gave me a chance to really look at the process also. Before you start make sure they are up to date on their tetanus.
If the kid was less than 6 months old I would disbud. Forget the disbudder. Use a piece of pipe that is the same size as the base of the horn. Hold onto it with vice grips, using welding gloves, heat it to cherry red either in a fire or with a propane torch. I didn't want to lug my boer kids up to the dairy barn to be disbudded, so we used this method to disbud all of them out at pasture. Once your fitting or pipe is cherry red, use your hoof nippers to cut the horn off flush with the head, beware the artery will pump blood at you. Use the pipe fitting on it's side to stop all the bleeding. Now reheat the fitting, or with a fire you can have several fittings sitting in the fire. Now using the pipefitting as a regular disbudder your can now burn around and on top of the edge of the horn bud, which is where the root grows. Burn down until your get a nice copper ring. Burn one more time flat on top of the head to make sure you cauterized the bleeders well. Apply ice in a ziplock baggies to the top of the head, and a shot of Banamine for pain works well on older kids like this.
Next year if you missed any of the root and you have scurs use the winter as a time to band the scurs off.
Banding is mostly done on older stock, since the horn is full grown it rarely grows much more. If you band young stock the horn will grow and eventually you will have a horn with a flat top, that you have to band. Banding unless you put it very low into the head, will not kill the root. Putting it down into the head makes this whole process way to painful. If you are doing this you should sedate the goat and have his horns scooped out by a vet or a cattleman. My vet then sews the skin together so the goat does no have gaping holes into the sinus cavity. You also have to stop bleeders with the scoop and stitch method.
Learn to disbud, disbud all your males before they are a week old!
Dehorning is definetly not for the faint of heart. Vicki