S
swidders
So tell me why you think solder is not up to the job then and will not safely fill the scored pipe
Personally, I'd follow BigBurners advice on all matters pertaining to gas and replace the damaged section with the 30 kW Broag combi. 5 year guarantee.
Seriously though, whether repair or replace the damaged section, the op may not be competent nor equipped to do either. So which method is best may be an academic argument.