[Richard Coutts-Smith]

Thanks Tom
A very succinct description. Sounds like the old gun rings that osbervers used in WW1 aircraft. Hopefully a photo will turn up eventually, surprised it was not mentioned in the Humber 1600 series book.
Re the one on ebay.
Take a chainsaw with you. Sounds pricey for over here, no sign of shedding, or perhaps the brambles are waterproof?
Regards
Rich.