Where is my reg seat!

[Skoad]

where the heck is the reg seat in the xvalve.

i've looked at the blow-up diagram of a retro valve and i still can't seem to find it.

[BlackVCG]

It's not a seat like in the AIR valve or the 4.5K FL.

It's just an o-ring that seals against the flange on the reg. valve pin.

Unscrew the back half of the valve, lift up on the brass retainer ring and the o-ring underneath it is the "reg. seat".