Velleman vertex3d K8400 extruder upgrade - bowden tip

I strongly believe after a long time use that the vertex k8400 need some major upgrades on the extruder/bowden side.
First, it is mandatory to shorten the bowden and reposition the extruder as shown by Hardbats here https://www.thingiverse.com/thing:2730016
Second, great improvement on filament loading thanks to the user Blackwolfn.
https://www.thingiverse.com/thing:1078641
In my opinion, a step further is to add a piece of bowden inside the extruder and near the gears to minimize the fr