Hi Neckel,
I bought a couple of AS modules recently. AS can supply an inexpensive Doepfer-compatible cable which replaces that supplied on the module. They are in the 'Buy online' section of the AS website. An explanation sheet is included and Bob Williams at AS is also very helpful.

It is stated in various places that installing an AS module in any non-AS rack invalidates the warranty.

The only problem with AS modules is that they don't line up with those from Doepfer - there is a gap either side - are there any simple cosmetic solution to this

Cheers, Nick