Graham,
The Maestro air filter housing. Cheers
Hehe,
Well Greg's answer was "Haven't a clue, though we did use an old air filter housing a while ago - no idea what it came from...". Transit brakes? Certainly Austin Princess brakes were used at one stage (another big heavy motor, so should be no problem stopping a Mog!) - just hope Mogs were not painted in the same s**t brown that many Princesses 'enjoyed' all those years ago

!
Cheers,