Set Square wrote in message ...
You can certainly make some of the connections with the base unit away from
the wall - for example, extending the tap connections down to somewhere
where you can get at them more easily once the base unit is in position.

But where would that be exactly? With the backing board and the sink in
position it looks to me as though you have no access to the pipework, which
comes straight up from the floor. Also, with an inset sink and a long work
surface, the whole assembly would have to be shifted away from the wall to
make the tap connections.
If the taps are attached to the sink and the flexible connectors to the hot
and cold feeds so that the combined length of pipe is 3-4" longer than you
need , maybe that gives you room to make the connections and you can then
just lower the sink into the cut out without the flexible bits getting
kinked. Dunno. Anyone done it?