the link to 'external gas point 2' is really useful. with a great solution to fitting the external gas point along with do's and donts on pipe fitting.
Drilling the big hole in the body is a bit daunting and the idea of a small pilot hole is good. Does any one have drawings, pictures or dimensions of where the steel frame is under the Aluminium skin, It would be useful for both avoiding it and knowing where it is so you can secure to it. Has anyone a good picture of the skeleton of a 530?
Ian