Cheers Ian
now fitted and a big big thanks to Sandy (Old Mac rocco)
From left to right you can see the black Bosal clamps, below the unknown new broken ones then you've got the vw ones with solid metal ring, then the Febi Bilstien wire type ring and then the tool for the job. You can see that the VW clamps look better in quality in terms of their symmetrical shape, over all quality and that they seem to have been galvanised.
I was able to remove the old metal ring and fit the solid vw ring and importantly with an extra pair of hands was able to fit these with a bit of persuasion. At a leisurely pace done in an hour with someone working from the top and from the bottom of the engine. The tool was stretching the clamp right to it's limit especially on one side but I think this was down to the hardness and seating of the new ring. Extra wedging/shimming from one side and jacking of the down pipe helps get the second clamp in. Used a block of wood, large flat screw driver and utility bar at one point.
Hope this can help people in future, might add further pictures.
