Hi Danny,

>Just had a quick look at this, if I may, the approach I would
>take would be to use a combination of Network and Blend
>ie. Network every second panel and use Construct>Blend
>between them to get tangency.

Hadn't even considered that as an option. I just tried it but couldn't get the blend to work (blend is one of those commands I struggle to understand). In the attached, should the selected curves blend or am I thinking about this all wrong? The second attachment shows what I got. I don't think I'm using blend correctly at all!