MK-NE'14 mk3s Extruder

Update 01/05/2021

i want an good light 3:1 extruder for my prusa mk3s with ldo nema 14 so i came with this simple design

i wan it the closest possible to the original version of R6 compatible with MMU / Normal setup with ir sensor

from the original parts
Fan shroud
Filament system
x-carriage
fan adapter

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Start Gcode
M92 E714 ;E-step for this ratio/nema14

*** have to set the start of G-code to Vref compatible on this Nema 14 photo (2)

{if print_settings_id=/.(DETAIL @MK3|QUALITY @MK3)./}M907 E250 ; set extruder motor current{endif}
{if print_settings_id=/.(SPEED @MK3|DRAFT @MK3)./}M907 E270 ; set extruder motor current{endif}

Nema 14
https://fr.aliexpress.com/item/4001346055973.html?spm=a2g0o.productlist.0.0.3c4c5565lgobBP&algo_pvid=5996aa31-e232-4257-a884-bb573224a2e9&algo_expid=5996aa31-e232-4257-a884-bb573224a2e9-0&btsid=0bb47a1a16197362184248751ebd35&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

Bmg kit
https://fr.aliexpress.com/item/4000021186440.html?spm=a2g0o.productlist.0.0.34f8133dOiaxLw&algo_pvid=665c15b4-94ab-4b55-bd75-91bc3fddcc9f&algo_expid=665c15b4-94ab-4b55-bd75-91bc3fddcc9f-0&btsid=0bb47a1a16197362504642183ebd35&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

Donation
https://www.paypal.com/donate?hosted_button_id=9EL8CEDVY28DA