you can increase the filter range by swapping a smd resistor on the bottom of the Juno-66 board.
The resistor is a 060 type with a value of 100k. A smaller value will increase the filter range. If you decrease it by a factor, you should increase the capacitor at the filter cable by the same amount.
If you do not have the right tools, swapping a smd resistor is not easy, so be careful.
I will see if this modification can be made default for the next production run