Yeah I am slow but slow it is. This hackberry is a tough foe but I am slowly getting there. Because of my vision trouble, I have struggled to get the crow of the belly flatter to where it is closer to being the thickness that I hope to be. So, I use crayons to mark up the entire belly from side to side and tips to the fades and then begin scraping. This allows me to see without any doubt that I am taking the crown down and not favoring one side or the other. I simply work the center section of the limb and as it flattens, the sides come in better. Yes, I can wade thru the crayons but we have a lot of them just doing nothing. The crayon cleans up nicely and there is no bleeding. This allows me to work out the rough stuff from the hard rasping to get it down to floor tiller without major problem. I am now down to about 1/2" thickness on the limbs and about ready to begin tillering. The crayons take out a lot of the guess work for me. I had worked the sides down to my lines but there was still some crown here and there that needed to be taken down.