Sounds complicated. I only have a Lenz 100 system and programme Lenz and Zimo decoders: no other doodads required, and the decoders deliver exquisite performance. Sometimes less can be more...
This is a good illustration of why it is important to get 'hands on' with a DCC system. I positively love the Lenz LH100, it can be operated single handed and most of the time 'eyes off' - my eyes are for use for watching the trains running!...I am going to now try to get to grips with the far from intuitive Lenz LH100 handset which I have been trying to avoid and see if I can do it that way , I don't know about anybody else ? but I find the LH100 to be confusing at best and totally non intuitive and clunky in use...