i just bought a cheap tobacco pipe [that i'll be using for marijuana] from a friend who no longer wanted it. it's pretty similar to the one in the picture except the last half of the tube is a detachable plastic piece. i was just asking for your all's opinion on whether or not i should saw down the bowl to make it better for marijuana. it looks rather deep as in the picture. i was afraid that a) i would screw up the sawing, b) it doesn't really even need it, or c) i can just make a small bowl inside of it with aluminum or a filter. any suggestions?