You can engage incumbent pedals in the LiberaToe signal chain by using our pedal connection modules: the 1X occupies one slot to provide 2 sets of send/return loops or the 2X occupies two slots to provide 4 sets of send/return loops. On the other hand, with the Gnavatar module, which has two sets of send/return loop (though its main purpose is semi-mix of several signals), your existing pedals also can be a part of the LiberaToe system's signal chain. Filling all the slots with a mix of the 1X and the 2X allows you to connect upto 12 pedals to the LiberaToe-6, or up to 8 pedals to the LiberaToe-4.