This has got a little messy but I have left it as is so you can see what I have tried. I know there must be an easy way to do this but I can't see it.
I am trying to align the spring with the silencers. I am trying to do this with mates but it just tells me that the selected mates are not in alignment. This I know and is the reason why I am using mates is to try to align the two parts.
I have tried aligning with planes and with a construction line but still no joy.
Thanks for looking, Daniel.