@mm2margaret ,
I just realised that VGTab-en.app in fact also provides a "PP_PhmSoftPowerPlayTable" within VegaTab_64_data.txt, which can directly replace the "PP_PhmSoftPowerPlayTable" implemented in my SSDT-X299-iMacPro-Vega.aml distribution.
Anybody is therefore able to easily adopt my SSDT-X299-iMacPro-Vega.aml for reaching Vega64 properties of his/her choice..
No need for using any additional kext.
In consequence, I updated Section E.9.9.2 and also implemented and attached a Nitro+ Vega 64 air-flow optimised SSDT-X299-iMacPro-Vega.aml to both of my X299 and to both of my X99 gudies (10.13.6 and 10.14)..
Cheers,
KGP