What you'd want to do at this stage, especially if you were going to sit there, is fill it with water to see if it leaks; nonetheless we'll move things on and fit the final panel around the top. Like me you'll have wondered how we were going to do that from inside, or how David Copperfield managed it during his recent tour?
Here though I'm interesting my own signature means of joining panels, in the shape of an outside weld. I discovered it during the course of any number of prior builds, which goes to prove that all of those mock-ups we've recycled since have led to this moment of glory.
In order to support the lid while we do this, with the aid of a bradawl we drive one of Asda's finest BBQ skewers through one side at a depth that will allow a seam of adhesive to be applied to the rim that will be formed: 25mm over a 20mm depth of foam as it appears here. These skewers are difficult to drive through the cement, so just use it to mark the far side prior to driving a hole with the tool.
