Syer,
yes, drill out rivets, slide out pipe, take out old, wrap around new and secure it around the pipe and re-insert and re-rivet.
I'm sure that Termi themselves must throw some sort of technology at it from a dB point of view, but basically, that's it.
Did you get stainless or Titanium? I didn't know you could get stainless.
Carl was talking about fetching it up in his van, but I'd sooner take the day off and watch the meister at work and talk ******** all day to be honest. Will let you know what I'll do - obviously dependent upon weather.
Cheers,
Andy