Well...
I re-installed DX9.0b, removed the current hardware, unplugged all CH usb devices. Rebooted. Shutdown. Plugged all usb's back in. Rebooted. Set up and calibrated joy,rud & throttle in control manager. Checked in DXdiag to see if all were present and accounted for. They were. Checked AH1 offline and all were there and worked. Rebooted. Checked again. All there. Upped a plane offline and shot down 3 or 4 drones. rebooted. checked, all there. Logged on, went into AH1. Spent some time setting up devices and stick mapping. I've got it down to reflex now, so it goes quickly. Set in turret of CA for a minute. Upped a P40 in a mission OL, flew for less than 2 minutes and lost stick control. checked in setup, devices all there. Tried to recal, nothing. Rudder and throttle still working. Cuss on squad channel. Loose keyboard. try alt tab to check DX9. Keyboard not working. ALt/F4, AH closes. Check DX9(dxdiag) devices still there. Check CHcontrolmanager, devices still there. Try to recal stick, no go...nothing. reboot repeat....nothing. Rudder and throttle AOK, stick still shown, no activity no recal.
Determine: Stick is finally DOA after close to 4 years dedicated service.
Conclusion: Time to search for a new stick. Dammit!