Rokuhan 0-6-0 Nn3 Coal or Wood Tender Shell
Changing Z scale tender shell to Baldwin-inspired N narrow gauge shell. 

The Rokuhan Z-scale USRA 0-6-0 is a well-running, relatively affordable donor chassis for conversion to Nn3. 3DP Trains has seven conversion kits available for making that change to a NKP (No Known Prototype) N-scale narrow-gauge locomotive. This kit is for converting the Rokuhan Z-scale tender to an N scale tender with for either wood or coal fuel. 

Carefully remove the friction-fit injection-molded Rokuhan tender shell. Using a dental burr in a motor tool, files, or sanding sticks, remove any remaining nubs left on the new printed tender shell from the 3D printing process supports. Test fit the 3D printed parts to the chassis and file/sand if necessary to assure an easy friction-fit. Add brass wire handrails and stirrup steps to suit. It is suggested the tender body be painted and lettered before installing on the chassis, using Vallejo Acrylic-Polyurethane primer followed by your choice of locomotive colors, decals, and clear sealer. Add scale coal or wood to suit. When dry, press fit onto Rokuhan chassis so printed shell side sills are even with bottom of injection molded plastic chassis.