• The rear vertical plate has been designed to fix the VTX and the RX, allowing a low stack height (FC + ESC or PDB) and an easy integration.
• The weight distribution has been optimized. In particular, the vertical distance between the battery and motor is reduced.
• Battery can be top mounted. Transversal mount is also possible, and even bottom mount if you chamfer the edge on the bottom plate. The frame fits with most of the 1300 -1500 mAh LiPo.
• The rear lipo strap goes through the vertical plate. It allows reducing the width of the top plate at the rear end. Better look, less weight, and more fresh air for the rear motors. 

Get yours here: Armattan Productions

A whole set of TPU accessories can be found here: Thingiverse