How to change Gobos of original BP-MovingHead

Hello,

I am trying to adjust the BP_MovingHead so it represents my actual real life moving head. Right now I am trying to adjust the GoboWheel.
My real Gobowheel is holding 7 gobos, while each gobo is called with an exact DMX-Value (1=gobo1, 2=gobo2 and so on). In Unreal the Datatable is using 15 Gobos and the DMX-Values have a range (gobo1 = 37-73 and so on).
I erased the Lines for Gobos I don’t need, replaced the textures with my gobo-textures in the data-table and changed the Range according to the manual of my Moving Head.
Then I replaced the DataTable in the GoboWheel-Component.

However: My Moving Head in Unreal keeps using the default unreal Gobo-Textures AND is no parking the gobo-wheel in the middle of 2 textures. I am seeing half half of 2 Gobos.

How would I do it correctly to get my 7-Gobo Gobowheel working (or actually the Moving Head has to 7-Gobo Gobowheels).

thank you!