Thanks once again @Phaedrux.
I honestly thought it was not being applied as it went 0.25 then to 0.20.
Is there a way to show the actual height as opposed to the corrected height, ie 0.25? For me it confirms that I have my settings in Cura correct.
(Damn, I had a 5 minute video, powerpoint presentation and the likes to show how it was not working!! 😉 )