Hi,

You can't modify Get Aximmetry Transform's pin in Aximmetry with controllers, because it is a transformation data type that is built up from multiple different values. So you have to decompose it into its components. You can do so with Transformation Compose which will give you vectors that you can further decompose into scalars with a Vector Merge module:

You can only use Controllers like MIDI on Scalar, Double, Trigger, and Logical data types. To use other data types, you either need to decompose them or convert them.

Depending on what you want to achieve, a Switch Transformation module might better suit your needs.
For example, in the Switch Transformation module, you could define all the transformations (positions) you need and switch between them by MIDI actions that are assigned to the Select pins:

You can add a Smooth Transformation module after the Switch Transformation module like in the above screenshot, so that you will have a smooth transition between the different transformations.

You could also use MIDI modules instead of assigning MIDI controllers to the pins. You can read more on that and on MIDI here.

You can read more about Get Aximmety ... nodes here.

Warmest regards,