Um... nowby Lost_Gear'sreackoning... seperation of the top stage - from the booster... "should have allowed the top section another "kick" - and... (Hey.!!! WHO put that satelitte there - oops "we" have penetration - & stuck fast too it is)
Well done in the recovery. Hopefully that nose cone turns up, either you get some coordinates transmitted over the iridium network or someone finds it washed up on the beach while walking their dog (soon rather than later). If I had a boat and a radius to search in I would be out there looking for it for you. For next time you should look into using a radio beacon as a redundant tracking system, It will take up less space than an AA battery and have very minimal weight.