Thanks Bruno Looking at using the 80 grit linisher at work it has a 5" wheel for the bigger areas as far as I can
Then either a tungsten bur see how it goes or resort back to lots of small barrel sanding bits
Last resort will be the angle grinder for bulk removal in the tight curves then back to the burs and dremel
See how I go I will improvise as required to give the best results without the heat input the final shape will be by feel most likely anyway these are my guides

My concerns have mainly been removing the tang area for height but I think the lower point should make up for it when stoping etc