They say the HSKRC Freestyle 250 is a clone of a more well known pilot designer frame. I really wouldn't know since I only own this one. The low-profile styling most likely was inspired (read copied) by the original, but the assembly and construction differs.

I made a few different design choices during the build:

• ESC Placement - I routed the motor wires and ESC below the arm. It saves the ESC and wires from prop hits. I also wanted the ESC LEDs to be viewable from the underside i.e. when the quad is "going", instead of "coming".
  
  

• Lipo Orientation - The lipo battery strap slots were positioned across the body, so I went with it. I feel like it gives me slower, but more stable rolls.
  

I definitely recommend an AIO for this frame. A double board 30x30 stack is possible, but it would not leave room for much else. Even with the single FC layer, I had to position the VTX in the tail section. The receiver and and 12V regulator are a snug fit under the inverted FC. For SmartPort telemetry, the Flip32 requires a BAT54 Schottky diode across the one of the inverted UARTs. Fortunately, these diodes are cheap and readily available on eBay. ReadytoFlyQuads.com provides a diagram on where to install the diode.

The XSR-M antenna placement was inspired by Whiffles, of course.

I'm still in search of a 3D printing service with teal TPU, for matching, of course!