Hi all, just a little update. I have added yesterday a trim/carb heat/throttle/mixture/flaps panel to my yoke. I had left a few A/D inputs free on the main board so I used them and modified the HID descriptor to include other 4 axis and 4 buttons.
It feels even better now in VR, being able to handle the real controls. Although I admit that, after four months of flight lessons, the simulator starts to feel highly unrealistic. Everything on the plane feels too-good-to-be-true… or maybe it’s me who’s used to fly now in a flying piece of junk 
Anyway, if you have a few spare inputs, I really recommend to consider adding these controls.