G'day Mark, 

We currently only have the Raven 2500 to measure although this measurement shouldn't be too different between them. The distance between the two mounting bolt rails is approximately 50mm. 

G'day Chris,

Not sure what you mean by roof bars sorry, but this is designed to be mounted to any kind of roof rack system that has a minimum of two racks or cross struts.
If you mean roof bars like the rails that run down each side of the vehicle roof, then no you cant.  These are mounting rails to attach a roof rack system too.
Hope that answers your question in someway!

G'day Richard,

The dimensions of the Raven 2 x 2.5 & the Kozi 2 x 2.5 awnings are the same.
Apart from discrepancy in colour and branding, there shouldnt be any issues using the Kozi wall with the Raven.
If you do want something more similar in colour, the Darche Eclipse side wall extension may be a good option.

G'day Ben,

There isnt one, basically. Both brands are on par with manufacturing quality and materials, and its very difficult to choose one over the other.
The Darche uses a slightly higher grade canvas, however, both awnings have the same waterhead rating, and the 23Zero has an additional light suppression technology which makes it darker overall when used with walls.
We cant choose for you sorry, but hopefully, that helps in some way.

G'day Theo,

The overhang shouldn't exceed 60cm on either end for any awning. 23Zero doesn't have installation instructions online, but they will be supplied in the box with the awning.