Anyone having concrete support for sink had to top up additional money for the table top (e.g. granite/ quartz)? I was thinking of having concrete support for sink and a wooden cabinet beside it. Whole stretch topped with same table top and front covered up by same wooden door. However, I was told that with concrete support, the depth of the sink top will exceed the standard 600 mm and I need to top up additional money to have a bigger table top to cover the top. It is impossible to construct the concrete support within 600 mm because of some metal piece inside the concrete to support the whole structure. Anyone can has similar problem or you have no problem at all? TIA