Taranis endpoints and subtrim not working in betaflight, pls help

Hi everyone,

I'm a new pilot and have just got a taranis for my home made whoop with an F3 Beecore board.

I'm having trouble setting endpoints. I have followed guides online to change the settings on the "outputs" page, and this seems to work fine to set 1000 for the minimum AETR settings, but when I try and change the max endpoints, they change on the TX, but do not change on betaflight. The centre point setting works, and so do the controller trims, but the sub-trim also does nothing.

I have extended ranges set on the model settings. I don't understand why I can't change the endpoints. I tried changing the rxrange settings under CLI, and while that worked, the max endpoints still wouldn't change.

Any help would be appreciated.
Thanks.

 

The default receiver channel map is TAER1234, for FrSky. In your TX do you have it set to D8?