I recently bought a 21inch illadelph beaker and ashcactcher and was looking to replace the stock illy downstem. Any suggestions? I am currently looking at the SG or Alex K. Not sure which one tho. Currently *** is out of the 6 inch SG which is the same length as my current downstem but do have the 5.5inch. If I do choose the SG would the loss of .5 inches make a differnce? Also i read that the Alex K should be vertical when used, is that true?