Are you sure 75 cm is the proper height for a sink? I think it's not quite high enough in the frontal view above. If you use the chair as a height reference, a standing person would have the sink just above his knees (or maybe the center of the thighs) which is a bit low for a sink which is normally above the waist. The image looks excellent by the way, the lighting and all seems very realistic...I have a lot of problems with scale myself...

ShadowWind