Commissioned by a band called Mucky Sailor, the Musical Ship's Wheel is a seaworthy sound maker that can be manipulated in various ways.
At the moment Cranmer is working on a steam-engine restoration, a tesla coil, a robot ostrich for an advertisment, and a modular synthesiser. As for a damn-the-budget-full-steam-ahead fantasy project?
"I'd love to make an enormous robotic duck and walk it around blocking traffic in central London," he says, "just to baffle the police and create a series of hilarious local newspaper reports. It would perhaps even be worth going to jail for a little while, because it would be an amusing event to look back on in later years."