I have grown up eating chicken without the skin so I removed the skin from this roast too. Feel free to leave the skin in if you so desire. Make sure you rub under the skin too if keeping it!
You might need more butter for basting. I didn’t really measure this too much, so please use your judgement.
Basting is absolutely crucial to a good roast chicken. Don’t even think of skipping it. I strongly recommend basting it 5 times in the given time of 75 mins. But if that’s too much work, 3 is the bare minimum.