The ideas is to use exiting LPFs as is, with the option to add a fifth if you so chose, 160m... or better 10m....
But mainly better lay out and separate relays...
I will provide a code snip-it for replacing the section in the original/KD8CEC FW for use with this board.
Kees, I am happy to combine efforts/butt out if you feel having 2 board options will confuse things, please contact me if you want to chat about this off-line...
73 Nick VK4PP