Steverat - only remember the bend was slightly out - can't now recall whether it was too tight or the opposite - was thinking it needed tightening but could well be wrong. Dunno about strength - getting on a bit now and nowhere as strong as I used to be. It's only a fraction required and wasn't unduly difficult - jut a good heave ho. No good leaning on it, you need to take it by surprise.
There really is no room for error on those pipes, especially the LH one, where the kink could afford to be slightly further back. As I mused a couple of posts ago, I thought there were different shaped bends according to year. As getting a good fit appears to be not unusual, I believe Feked claim their pipes are slightly different and effectively a one-size-fits-all.