We have got quartz worktops and upstands fitted in our new kitchen. I would expect some small gaps (2-3mm) between the upstand and wall as walls are never perfectly flat, but on one wall I feel the gap is too big, probably about 6-7mm. Does these seem too big? Will it look OK if filled with decorators caulk? Anyone have experience of this? The fitters are back this week to do the utility so I will raise it with them.