I had a customer ask if the new X1 transmitter will work with the older manual flashes such as the AD360 and V850. The answer is “yes, absolutely!”. You do need to use the new X-System clip in receivers. For the AD360 use the XTR16. For the V850 use the XTR16s.
Your flashes will also work in high speed sync with the X1. You do need to enable the HSS feature on your flash first. Then rock and roll in HSS up to 1/8000.
Here is a quick iPhone video I shot to show the X1 working with the AD360 and XTR16.