Ender-6 & BIQU H2 mod max print area

BIQU H2 4x4 points mount for Ender-6 --------------------------------------------------- Intended to achieve maximum print area. For this purpose, the nozzle located in the center of the carriage. **Attention**: X end switch must be [relocated](https://www.thingiverse.com/thing:5948318) first in order to reach 274 mm X span. The mod is not that easy and requires a bit of metal work. Comments on photos in order of assembly: 1. Area test print. 2. Mount & H2 assembly (M3x20 through the fan's bottom hole, M3x8 on mount's back sink in the H2 back top hole). 3. Front side mounting on carriage (2 x M3x8) 4. Top left screw & nut (M3x18) to the fan. 5. Back side mounting (M3x12 & shaft in the pre-inserted M3 nut, M3x16 & shaft in the H2 back bottom hole) 6. Gantry bracket cut allow carriage moving up to 274 mm by X. 7. Fan ducts mounted: right - by 2 x M3x6, left - by M3x20 through the fan's top hole in the H2 body, by M3x18 through the fan's bottom hole. Design remixed from [K3D