Video looking at the simple design of an 8th order Cohn Filter. Please note the purists approach to crystal filter design was not taken in particular case.
Since the video I confirmed the two trim pots are 100 ohm each so 200 ohms total. When I place a 200 ohm resistor across the VNA (no filter) I get -9 dB. So all things being equal, the insertion loss is around 3 dB. Not prefect, but not too bad either.