well here's the thing about leather dye. its real chronic on the hands, but on walls its not THAT great. dont get me wrong it still is good but make sure you mix it with something, like marsh or griffin. give it a try and tell me what you thought of it. and the trick to the eraser nibs is to coil them up HELLA tight! the tighter you roll the less drips you will get. i have never had a spill so i guess i must be doing something right.. but yeah if you left it upside down for awhile it would leak. just keep it in your pocket when you bomb and when you're storing it in your room or where ever just keep it in an upright position.