Originally Posted by tonycon
Should be fine...the etha has the sl3 regulator that can use any input pressure.
Not strictly true:
Yes the Etha has an SL3 inline regulator, BUT consider the fact that the Etha has a higher operating pressure than the likes of the Ego/Etek and Geo and the fact that it is desirable to have a pressure differential between the output pressure of your tank and the Inline reg. We wouldn't recommend running the Etha on an SLP; we'd recommend a mid or high pressure regulator for the best results.