Hi Steve,

No probs & Thanks for taking a look at it.

...hmmm, it's funny because I did suspected that those curves may have been slightly off so I redid all the Curves & parts several times.
I've got 0,0,0 mapped to my F4 key & I constantly use it if I suspect that a Curve might be slightly off...
...all of these ones didn't move so figured all was well & that they were aligned to each other, looks like I was wrong!!

Glad to hear that's it only User Error on my part & not some bug that's shown up.

regards Colin