Email the maker of the phantom, Mike from CCI. His contact is on phantomonline.com
He has a new regulator for the Revolution that will fit the Phantom. It is only ~1.5 inches long, is integrated into the vertical ASA, and regulates from 750-850psi
There are 2 choices. 1 with 1/8NPT female fitting, 1 with ASA fitting. This will replace your current vertical ASA, and is vertical (vs angled on the original phantom).
Great price too, much cheaper than AKA or Palmers Reg.
I just placed my order for one this weekend. Super excited!