I started early and finished my work for the day early so that we could afford the time to go to Wooroloo for a few hours.

Woody continued on with filling screw heads in the cement sheeting.

This is very handy, as it will allow me to paint the walls as soon as the tiling and cabinet fitting is completed.

I think that painting the walls out will really give the place a real lift.

Woody also started work on filling the slot in the wall around the washing machine connections.

This means he needed to place and glue some strips under the surface, either side of the hole.

Next visit, we will glue a surface repair on to these strips.

My main purpose for the visit was to mark out a profile on the bathroom floor to indicate where the toilet bowl will stand.

This is essential so that I can continue tiling in that room.

I need to ensure that under the toilet bowl the raw cement is left exposed.

At the same time I still need to make sure that 30 to 40 mm of tile runs through under the bowl for a good cosmetic appearance.

For positioning the toilet bowl on the floor I probably made a mountain out of a mole hill.

I'm sure a tradesman would just go - "plonk, that's close enough, it looks centred".

However, I had too much time to think about this while I was taking my daily exercise walks.

The problem is that the base of a toilet bowl is a very irregular shape and difficult to accurately bisect and draw centre lines on.

After a lot of deep thinking, here was my plan to place it accurate to a couple of millimetres:

First I traced around the base onto some writing paper (four pieced taped in to a large rectangle).

Then I cut out this shape in the paper.

Even though the shape is irregular it is still relatively easy to measure its maximum length and width.

I then drew up a rectangle using these dimension on to a piece of packing box cardboard and measured and marked the centre lines of the rectangle.

Next, I placed the paper cutout over the rectangle and rotated and adjusted it until the waste shapes looked equal.

I then transferred the centre line markings back on to the paper shape.

Then I placed the toilet bowl back on to the paper cutout and transferred the centre line markings on to the base of the bowl with a permanent marker (will come off using methylated spirits).

You may well ask why I didn't just place the bowl directly on to the rectangle and rotate it until I obtained bilateral symmetry but I am sure that the paper cutout gives a more accurate result.

Back in the bathroom I measured and marked up a centre line in the space where the toilet is to be installed.

I then placed the bowl on to the centre line using its markings to set it up squarely.

I temporarily installed the cistern to check if this caused any additional displacement away from the wall.

Once I was happy with this, I also marked on to the floor, the other centre line of the bowl and ran lines all the way to the walls and up the walls for about 100mm.

This will let me re-establish the bowl position even if all the floor marking become obscured during the tiling process.

I then ran a marker pen around the bowl profile to leave its position showing on the cement.

As additional insurance, I cut up a piece of large cardboard to drop exactly in to the same space and marked on the bowl profile.

I then sketched in another shape, 30 mm smaller inside the profile and cut this out.

I then used this to mark on to the floor the required edge positions of any tiles to be cut around the toilet.