Ken Marshall was the right electrician for this 'tricky' cavity size and the 'template' which needed to be cut to fit the new oven. The cavity size required for the 'Bosch' oven is 548mm, so we needed to build the extra 45 to 50mm. to take on the new oven. It doesn't look out of place, and fits just about perfectly with the cupboards above and below the new oven, I should have done it long ago. But then it might not have been Ken Marshall..