I have MTH DCS TIU with a Lionel Cab base to run my MTH and TMCC engines. I use the MTH remote for everything. I wonder if a Cab1 remote can also be used in this set up as well. If a friend that has TMCC Cab1 remove brings his remote to my layout, can he use it and can we use my MTH remote at the same time he is using his Cab1 remote?