Dynamic does list a PDF on gear adjustment on their shaft drive bikes which may be a help to you. I have not downloaded it but if the shaft drives are similar enough it may help with your Incline. Here is a link to the page from which the PDF supposedly can be downloaded.
http://www.dynamicbicycles.com/innovations/techtips.php
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Gear Hubs Owned: Rohloff disc brake, SRAM iM9 disc brake, SRAM P5 freewheel, Sachs Torpedo 3 speed freewheel, NuVinci CVT, Shimano Alfine SG S-501, Sturmey Archer S5-2 Alloy. Other: 83 Colnago Super Record, Univega Via De Oro
Visit and join the Yahoo Geared Hub Bikes group for support and links.
http://groups.yahoo.com/group/Geared_hub_bikes/