This Ringling Bros. circus cage wagon kit was modeled from a plan in Little Circuswagon. Issue 5 2007, the bimonthly magazine of CIRCUS MODEL BUILDERS, INC. INTERNATIONAL. You can check them out at www.circusmodelbuilders.com. The model is sized to quarter inch per foot, a scale of 1:48. Basic modeling was done using Cubify Invent. Scroll work was sculpted with Photo to Mesh by Ransen Software. They were combined in Autodesk Meshmixer. The cage is a new home for Laurencio's Hippo, http://www.thingiverse.com/thing:10443 that I modified in Meshmixer to a posture emerging from the wagon's water tank and scaled to pigmy dimensions.
Start the assembly with the bottom ends and sides. The roof will accommodate any tolerance buildup in the assembly.