How did you calculate the motor speed to the slider position?

[TravelTrader]

First I want to thank you for this awesome app. It's easy to use and works perfectly.

When using the Touchscreen Controller of Powered Up I noticed that I cannot use just a linear function because then the slider has to be moved first until the Boost starts to drive. Because I want to learn about - not only to use it for a some code for the Mindstorms Hub:

How did you calculate the motor speed in relation to the slider position?

And here my second question starts: You already mentioned you won't code anything similar for other controllers but what about the Lego Remote Controller (BLE) or for the Mindstorms Hub? Would be great. Just an idea. :)

Thank you and a best wishes for you!