OK, the Dragon and Trumpeter methods of rendering the chassis are very, very different. Perhaps because of superior molding technology, DML goes for a single-piece chassis. Other than problems of warpage, this makes it easier to get the thing going as you can see from the results of Step 1:
The Sd.Kfz.7 base unit's chassis is complex, and DML uses other fully-molded complex parts to avoid the need for sub-assemblies:
This, by necessity, involves some simplifications, but this is a Smart Kit, so there is overall less PE and fewer parts than with the Trumpeter, which has numerous sub-assemblies and smart parts that will bedevil some:
As you can see, there are many more fill issues with the Trumpeter kit. Overall, the quality of the molding is superior with the DML kit. Trumpeter has struggled with its mold technology, resulting in many unsightly knock-out holes, often in hard-to-reach places. This portion of the frame, for example, could have had the filler points on the other side where they could be dealt-with more easily:
Where Trumpeter excells, IMO, is the detailing of its transmission and engine:
The two chassis compared:
The Trumpeter chassis is harder to assemble and takes some care, but the instructions are very clear and easy-to-follow. The DML instructions are a little less-clear in spots so far, but what else is new?