My delta V seems to be pumping too good...In conflo I have 3 10-7 torr so my 
signal for a 2 microliter of N2O (~100nmol) is only ~1 volt which seems about 
an order of magnitude too low...This is after changing the inlet from 50 
micron to 100 micron capillary.  Ive cut ends off twice to ensure no blockage, 
but still good vacuum.  Is going to 200 micron an option anyone else has 
tried?