Eric,
Did your T20 come with the XPG-R5 and LOP (light orange peel) relector? That was the default option I received (8/2010) from Tod at Illumination Gear which provides more lumens and lux than the Q4 neutral led that you ordered.
However, an XRE-R2 emitter with LOP reflector is also available from Tod and is the one I am adding to my T20 to produce around 14K lux vs. 9K lux for the XPG-R5 w/ LOP that I currently have.
So if greater throw (14K lux) with a nice beam pattern (w/ LOP reflector) is of interest to you, as it is to me, Tod has it available right now at Illumination Gear.
I hope this info helps!
John