I've got things up and running for the most part, down to 3 problem devices - all ones I had issues with in AHP but was able to use macros to get to work:
1) Kitchen Sink light - this is an X10 dimmer switch. Currently turns on but will not turn off from HG or Alexa.
2) Table Lamp (currently used for Christmas Tree) - in AHP, I had a macro defined so that when a specific PLC command for a trigger device was hit it would send an RF signal to the x10 device for this. I had 2 macros - one for on and one for off.
3) Living Room Lights - same issue as #2, and in fact the same room. Similarly, I had macros to trigger RF commands when triggered and these had been working in AHP but not working in HG / Alexa.
Taking a break for now, am going to leave things running in the Pi Hub and shut down the PC and see if my timed events I set up in HG get triggered correctly.
Any help on setting up HG macros to send RF x10 commands would be appreciated.
Thanks