Paid a visit to Jonathan, (expeatfarmer) while out this morning. As we talked and perused his latest acquisition, something caught my eye under a bench. A length of stainless pipe with a flap on. Surplus to his requirements, it found it's way into the Discovery.
Back home and a bit of scrating about in the workshop, some welding, some lath work, some drilling and the result is below.
Not what I expected to do today, so thanks Jonathan.