I successfully flashed my ZTW and Blue Series ESCs using the HK Atmega flashing tool and bs_nfet.hex file from SimonK. Both of these ESCs are all n-FETs. The older "Mystery" A-Series 12a ESCs use both n-FETs and p-FETs so they would use the bs.hex file, but these ESCs are not what comes with the x230 Mini Quad Combo from HK.

The performance increase was fantastic! I flew indoors in my gym and the foam shell provided excellent protection when touching a wall. The green tape designates the front of the quad for now. I also added some feet cut from the light flooring material sold at home improvement stores to protect the battery from getting hit.

I'll make a video soon...