Fastball

This is a 200mm MTM racing quad. It is a tight fit to get everything inside so not a great beginner build.

The arms and two central plates are designed to be made out of carbon fiber and are available for purchase here. Arms to clear 6" props are also available.
https://armattanproductions.com/pages/kit_detail/57

Might make a few more changes to the dome for access to the USB port and to fit the VTX or any recording camera a bit better.

Bunch of pictures here.
http://imgur.com/a/bFTxA

The assembly goes something like this. The arms spacer and baseplates are bolted together with the two inside holes on each arm with the heads of the bolts facing down.

The bottom dome has the XT60 connector and wiring installed and then the PDB is installed.

Camera is mounted to the upper dome.

The arms and center plates are now attached to the bottom dome and any motor wiring can be completed.

Install the flight controller and figure out where you are going to fit everything