Having done the rear section of the pipe I had to do the front section which is a lot longer and has the cruciform bit on the end = aaargh.
Set up the grinder with a mop on it outside to avoid spraying polish snots everywhere, scruffy gear on and set to it.
That’s the easy bit done.
Not the best but near enough, the stainless is poor quality and I didn’t have the right bits to get in all the corners of the cross-over.