Similar design to the Evolv refrence model, but this has a larger battery compartment at 90x36x23mm. Turnigy Nano-tech 1500mah 3s 70c battery will fit. This mod uses a FatDaddy V4 LowProfile (short or long) or Varitube 510. For the case screws use 2-56 x .75" long OR 1" long stainless steel, The board attachment screws are 0-80 round head .1875" long stainless steel. For Metric screws, the 3 board mounting screws, M1.6 x 4mm. For the 4 case screws, M2 x 20mm. My "DNA200 Case Buttons" will fit this model, if you want different colored buttons.