“it’s got a extra padding underneath creating a grey space between the header and slider”
Thats what the first step was supposed to cover…..although I don’t see it now when I look so I assume you fixed it.
Since you’ve added a different logo just now, (which appears to be a different size) you’ll have to adjust your padding and margins to get the result you want. I would add the bottom padding back like how I had it in the code and then adjust from there, otherwise it won’t have any space between the header and the slider.