UV Map Unwrap:
-Details UV
-Robot UV

All Surface Named.
Only Quads. 

Unit Used: Centimeters.

Large Textures (8K Resolution).

-Details AO (8192x8192 pixels)
-Details Color (8192x8192 pixels)
-Details Normal Map (8192x8192 pixels)
-Details Reflections(8192x8192 pixels)
-Details Roughness (8192x8192 pixels)
-IRB Main Color AO (8192x8192 pixels)
-IRB Main Color (8192x8192 pixels)
-IRB Main Normal Map(8192x8192 pixels)
-IRB Main Reflections(8192x8192 pixels)
-IRB Main Roughness (8192x8192 pixels) 

Best Regards.

Adrian