I use plumbers goop for my soundboards and surfaces, so I take the nozzle top off of the tube, touch the feather stem to the little curl of glue that is sticking out. If you can see even a tiny bit of shiny glue on the feather stem, you have enough. I then place the feather on the soundboard and place a small wood cutoff (about 1"x1"x2") on the feather above where the glue was placed. Let it sit for a couple of hours and it will be good to glue into your call.