I was told that Lignum was used because of the natural oils in it. I have worked with lignum and let me tell you two things. It is very oily and if you lean a slab of it against the wall it will warp pretty fast. The other thing is that it is very irritating when you get the dust on your skin. I mean it actually burns. For those two reasons, I use cocobolo exclusively for my sticks and slicking blocks. Also if anyone is interested, we have a line of rub sticks, bouncers and string sticks available for sale. I will try to get some pictures up this week.