Alright! 2nd build post. In the box with lots of shelf wear is an unbuilt Kyosho Ultima RB5. It was for sale at a local shop. The box was opened and several of the parts bags had also been opened. I was able to make a deal and upon a more detailed inspection at home, it was only missing the rear chassis plate. That's the part that connects the transmission to the main chassis. I guess someone opened the box and only removed that part. ¯\_(ツ)_/¯
The only modification I'll make is adding the Lunsford turnbuckle set. The RB5 in the picture is my original RB5 that I bought back in 2007.