Heavy Duty E3D V6 mount remix for Tronxy XY-2

This is "Heavy Duty E3D V6 mount" based remix for Tronxy XY-2:
1) mount base was reworked due to different threaded hole placement against Ender 3, CR-10 and etc;
2) later I discover that Tronxy XY-2 has a trouble with BLTouch (or it clones), but it works perfectly with PL-08N sensor;
3) 50x15 fan wing was updated for 40x20 size;
4) also, it's cool idea to use guard for front fan (https://www.thingiverse.com/thing:1662879).