- larger holes for z-plate
- selective infill near walls as reinforcement middle M3S nut
- deeper holes for hold-together screws ( M3x20 and M3x40 ) for better assembly
- adjusted screws holding Buddy board in place
- reinforced slots for z-bottom-cover
- opening for power connector adjusted for better printing
- better aligment of USB connectors holes
- slot for nut holding cover in place adjusted to eliminate nut falling from the slot