Thanks for the comments folks , I tried to remember most of the tricks I learned from you folks over the years , I did chuck the brass rod into my vise (while screwed into the boiler bush) & used a light prying method with a piece of pine wood , & while under stress I tapped the dented high spots with a small brass hammer. I assumed I would need to un-solder the end cap & have a go at it that way, & I think that way may have worked slightly better...but I'm happy with it as is. interestingly the bush stayed soldered until the very end , I re:liquefied the solder as I'm sure it got cracked somewhere in the manipulating process. what I'm baffled by... in looking at the severity of the dent, how did the whistle or steam line not get crushed ?