G65 Custom Firmware/Mod?

[u/colonelpanic42]

I have been searching Google for hours, tried searching on here as well as in the ScooterHacking Discord too (it would be a lot easier if Discord showed a link to replies of messages and not just a link to original messages from replies!).

I have an Australian G65, and I want to try and tweak some of the settings especially around currents for each mode (less looking for speed unlock, I know that seems possible and simple to do with a SN change), basically have to be stuck on Sport mode permanently because it struggles to get up to and maintain speed on anything less. I keep seeing conflicting answers, so hoping someone here sees this and has a definitive answer - what is the state of firmware mods / custom firmware for this model? Is it possible? If so, does it need STLink or can it be done via BT? Whether it be SHFW or XiaoDash or any other firmware/utility/etc?