Tie Oil Saturating Wagon Frame - N Scale

In 1889, Royal Bavarian Railroads used a wooden railroad tie oil saturating wagon.  This is one of three models required to build this N scale wagon:

Tie Oil Saturating Wagon Frame - N Scale
Tie Oil Saturating Wagon Tank & Rack - N Scale
Tie Oil Saturating Wagon Donkey & Grate - N Scale

This frame requires wheels, trucks and couplers supplied by the modeler  The trucks can be attached to the frame with a 5/64 bolster pin (note, the bolster pin holes may require reaming or drilling for the perfect fit).  The model was designed to use rapido coupler.