It floats!!
Well managed a little bit more today. As I originally posted, I'm trying to make this project from as much recycled ♻️ pieces I can find. Early day's and not resorting to dumpster diving yet 😂.
So firstly started with 2 slim fast containers, liberally coated with pva and bolted together for extra strength. Placed some good old fashioned lead sheet inside for weight and stability, tested in my homemade water tank for weight distribution and leaks. All good so far. Wrapped in black gaffer tape for added watertightness.
So to recount: The slimfast containers had reached their expiry date and so acquired these, securing bolts came from a property I was helping to clear out as did the tape and lead weight. Other parts for possible use are the plastic packaging from pork pies and cakes. On a roll at the moment 😊