Ender 3 upgrades

Basically this was a desperate attempt to avoid throwing away my ender 3 and getting the best out of it.
Was upgraded in multiple stages:
1) Microswiss ng direct drive extruder added, linear rail of length 320mm was mounted on the 2020 using 12 din 912 m3x8 bolts and matching drop-in T nuts.
to attach bltouch firmly in place , custom bracket was machined out of 6061 aluminium.
x-homing end switch had to be relocated: it needed to be closer to the front by 12 mm for it to engage properly, for which the spacers were machined out of 6061 aluminium.
Marlin was tuned in for the microswiss ng to work properly.
2) Y axis upgrade. for that 2 linear rails of length 320mm each were added underneath so that position of the bed plate above 2040 v-slot stays the same (mostly to avoid messing with the timing belt), custom brackets were machined for that.
Y-axis limit switch had to be relocated:had to be able to freely move over the mgr12 rail. spacer was machined out of 6061 aluminum.
3) Z axis upg