How to set the gear pressure on the filament

Snapmaker J1/J1s
1

Hi,
Some filament such as wood are not sliding as well in the ptfe leading to some extrusion problemes. Is there a way to increase (and reverse) the pressure on the filament in the extruders?
This is available in all other 3D printer but this one?

2

Feed filament directly into the extruder

3

There’s no built in way to adjust the extruder gear pressure, no.

I seem to recall someone designed a replacement extruder gear door that has tension adjustment. I don’t know/remember if the files are posted anywhere though.