i have retired this unit for the time being, sister isnt around today was gonna modify it for me. oh well. the thing is the tube diameter is too BIG. definitely not as good for vapor i figured it out now, its not big bongs, its large diameter tubing is the culprit.. for problems.. 2 problems.. one, it doenst pull hard enough on the titanium, to pull the vapor adequately. you need a fair amount of airflow,, suction, on the ti pad to vaporize the oil easily. with a smaller tube, one can vaporize a much larger hit with a cooler piece of TI .. huge difference it makes really, that tube is twice the diameter it should be. and 2, it gives too much air mix with the vapor as well. your lung gets totally filled, just to vaporize the oil, which doesnt vaporize too fast anyway cuz of the lower suction now that i have gone back to my old unit, i really see the difference. gonna stretch and skinnify the tube on the GOG one, when my sis has time(is home ).