Contacted Craven..probably gonna get a "D" rack. Anyone have positives/negatives to add?
The rack shown in the brochure next to the description was designed by VOC member Ken Craven, and originally had four rounded corners. It is carried on four brackets and as two are rigidly mounted and two move with the suspension they need to have bushed connections. Two rails are bolted at the front of the seat, bend down to clear the tool tray then are stabilised at the top of the seat stays before bending up to carry the flat inner rails on the rack.
There are two more flat stays clamped to the sides of the lifting handles, standing nearly vertical to carry the rear of the rack.
Phil Primmer produced these items for a while and made lifting handles with welded on lugs to overcome the problem of the clamps sliding down. I do not believe that these necessary bits are available at the moment.
The advertised carrier D appears to be only the actual top part of the rack and to have none of the Vincent specific fittings. There is a used one on ebay (UK) at the moment.
The Ventura carrier, originally the New Zealand Bike Pack, has also been developed from a dedicated Vincent design and fits under the seat with, I believe, removable and interchangeable rack ends.
For serious luggage something along the lines of the sledge detailed in Know Thy Beast is a better bet.