Double dong extruder (deprecated)

Looking for someone with metal working/milling abilities to realize this<<

Seeing several attempts to create extruders with two drive gears, I tried to replicate that. By adding a 2nd axis with a 2nd drive gear which gets driven by the extruder motor over two simple herringbone gears one should get more control over the filament.
The tension is produced by 4 m3 screws with springs on it.
I imagine by replacing the normal guide bearing with and actively driven gear, there will be more motor power transmitted onto the filament. The hole are designed for small bearing 10mm OD and 5mm ID.
This could be especially interesting for 3mm bowden set ups, because if the driving force only comes from one side the possibility of biting pieces out of the filament is high. The 2nd gear could distribute more force more evenly.