Five months ago I joined the waiting list for a local joiner to do some woodwork in my house, the most complicated bit of which is a built-in wardrobe in the room with the 100º corner. We didn't resolve my sketches and his skills when we met in December, and he's due to come back this coming week to talk it through.

I hope the problem was that I'm hopeless at sketches and 3D drawings, which this really needs. But I can draw scale plans and elevations (even though I can't at the moment lay my hands on my pad of squared paper). Having done those today,  I think I have understood the principles of drawing 3D and I've also realised that the joiner is seeing this task as making a piece of furniture whereas I think it needs to be a frame with wood cladding.

Fortuitously, I have today arranged to meet my problem-solving joiner nephew in nine days' time, when I will be close to where he lives, so I will be able to pick his brains.

Meanwhile, on with my attempts at 3D drawings on more bits of plain scrap paper.