I just go my pt04 is from china
(1.5 week shipping time to Central cost california)
( $70 for 4 receivers)
So far i tested them on my 283s and 285hvs. My results are 19/20 for four flashes firing.
NOTE: i put them right next to each other, like in maroon's review of V4 which failed horribly at that test.
So i even did a 99% confidence interval and 99% fire rate is a likely value for the true population proportion of four firing.
I was across my small living which simulates the distance most people will use when in studios or doing portraits on location.
Am I happy? YES!
and they use AAA with no modding!.