The D600 kit is designed to fit on a standard cloass 47 chassis. This makes life pretty easy on fitting, it is also a good compromise as the D600s and 47s were close in length (certainly close enough to make the difference neglidgable in N gauge).

The kit also contains resin parts for the battery boxes and underframe detail. However one part stands out as being very different and that is the bogie sideframes. The D600 bogies were heavy cast affairs and were old-fashioned even when new. The class 47s has very different bogies.

Fortunately the N Gauge Yahoo group came to my rescue and suggested the Class 77 bogie sideframes made by MSL for their kit. Although not quite identical, the class 77 bogies are very close to those on the D600s. They are also cast to fit the standard Bachmann/Farish 3-axel bogie which makes fitting them to this kit easy.

After check photos of the prototypes I was convinced that this was the only way to get accurate bogie sideframes short of making my own so I ordered a pair. Here is a picture of a painted sideframe prior to fitting. I have also included a link to a photo of D600 in her first year showing the MSL kit to be a reasonable match.

http://www.railblue.com/pages/In%20Depth/hydraulic_pioneers.htm