Stage 1 - pin the whole thing to the corners as you roll the hem. Pinning everything up was a game, until I did it in two stages. too complicated! To measure the covering for the side panels and the door, I put each panel down on top of the material and drew round it, leaving a generous spare for a hem. I was also toying with the idea of a one piece cover. This first picture shows the fabric being chucked over the frame to get an idea how it might look.

I wanted something that was opaque, but would still allow the light to shine through it. The frame is covered in White lining fabric. I painted black, all the parts of the frame that might be seen. this is vital, as when you come to screw everything together, those angles need to be correct, or the whole thing will be wonky. Lay the cut lengths out on the ground and MEASURE THOSE ANGLES.

In the UK we can get this from DIY shops in bundles of about 6 lengths each 2.4 meters long. Once you have worked out the lengths you can get your baton. As an example: a piece of card for the door panel that measures 18cm, scaled 10 times would be 180cm, or 1.8 Meters. the dimensions you would scale to something approximating the size you want. You can then measure the dimensions and angles. The process is to make panels out of card, and fit them together using a bit of tape so that you can see what the shape will be like in 3D. (Unfortunately I don't have a picture of that). I used a cardboard model to work out just how big everything would be.

The hardest part of the frame is getting the geometry right. The frame is made of wooden baton and hardboard corners for strength. Time machines need to be at least as big as the people they are going to bring back from the past or future. The design principle was that this should store flat.

Homemade time out chair