About this 3D model

Probably an unneeded solution to a non-problem. When I installed the Heated Build Platform on the MakerBot, I ran the cables from the extruder over the top of the bot, down the back to the HBP. I didn't like the way the cables sat on the z belt. Instead of running the cables through the inside of the machine, I designed a doohickey to support the cables and protect the belt.The bottom notch prints just fine for me. I could have modeled the bottom endcap in place, but I have an almost pathological attraction to symmetry.