The Lappyvator. Geek notebook nirvana?
The problem – One sore coccyx as a result of a bicycle incident. Treatment, lots of rest. Requirement, computer.
The solution – 3 metres of PVC pipe, hacksaw, Cat5 cable, strap, glue.
Each type of laptop is a different size, with different bits sticking out in different places, so there’s not much point in drawing up and publishing exact dimensions. You might be fatter or have shorter arms than me, or lie in a narrower bed, and each such factor changes the design parameters. Thankfully, working out variations on the design by trial and error is not too difficult (at least, until you add the glue).