I have only made a few, so i am no expert on mammoth tooth. But I have a tip or two that has helped me...
I use regular vulcanized fiber liners, glued up with my standard epoxy. After flooding both sides with CA glue like Mr Niro said.
Use only new sharp belts and new sharp metal cutting bandsaw blades. Use light pressure only, let the grit/blades do the work. Don't over heat.
I have had no problems drilling with standard drill bits, dry and no cutting fluid, but I use only bits that are new or newly sharpened with my Drill Doctor (one of those gadgets that really works).
Keep some of the powder from the scales after you cut it or drill it. In the likely event you have a chip out where a pin hole is, or on the very edge of a scale, you can fill it by using clear epoxy and mixing in this powder dust from the grindings. It'll fill in and be invisible.
I have always used brass bolsters on front end and back end of handle, for protection. I kept one knife, and use it. I have dropped it on concrete floor by accident before, put a little ding in the brass. But no harm to the mammoth tooth. You can use smaller pieces of mammoth if you use double bolsters, as well. Smaller means cheaper.
I like to dovetail all bolsters but that is a personal preference.
Dan