flint , yes, sorry , I see you what you mean mate
I wonder if in a well sleeved pair...one would consider it just as strong as original chamber walls..(don't know how tight the fit is)I've always kinda thought that they would be..but am just wondering.
I wonder would the insert wall crack or bulge if too thin & had a sloppy solder fit into the stubs?
John Foster, SKB ,Hugh Lomas??????,
Franc