The new Garmin Astro with DC-40

My friend, Glen, just got his new Garmin Astro with the DC-40 collars!  Just in time for me to "borrow" them for a field test next month chasing Chukar.  I'm interested in seeing what difference there is between the DC- 30 and 40.  I'll be running the -30 and have been using it for  a year now with fantastic results.  I hope the -40 will achieve the same range and faster lock on times.  I heard they upgraded the charger, too, which was a weak point in the system.  Will keep you posted!