hey my friend recently broke my downstem and he went to buy me a new one today. i have a glass on glass 2 foot double perc. im pretty sure its the 14.4 size and im not sure if the downstem is too long for it, its a beaker bottom and the end of the downstem touches the bottom of the base. i also measured the size of the downstem and its 14.4 and i measured the size of the joint and its 18.8. could it be that its too small? my bowl fits perfectly and its airtight.