2. after you have established that you don't remember much of the maths you learned at school, consult your husband for technical advice. They come in handy for some things crafty, it seems.
3. don't bother with a practice run. Cutting large pieces from precious vintage sheets and hoping that they will fit together in some semblance of the object you have in mind just adds to the thrill.4. make sure you drop your tin of pins at least four times. Crawling around on all fours picking up pins is one of my favourite pasttimes, especially when seven months pregnant. Right up there with retrieving pieces of lego from the far corners under kids' beds.
5. swearing is optional, but at this stage, I would say go for it. I did.6. after the piece has finally come together, and you're feeling quite proud of yourself for how well it actually turned out, hand it over to the four year old and watch while he tries to fold himself up in it, climb in and out through the window and generally do his best to make it look "lived in" (including adding small items of furniture). Let's just say it's been well and truly road-tested, and is still standing. Phew.
7. even though the whole process may seem a little like child birth...a lot of pain but with a truly magnificent result...don't even think about doing it again. No matter how many people say "will you be putting these in your shop...?"