Radio DX7 vs DX8 or suggestions

[Hotwheels]

I have the Tamiya original light kit which all works but with the toggles on cab. Any of this usable or does it all need to come out and rewire in order to wire in to receiver so tx can operate these functions? If I go with the newer Tamiya MFUC unit I was wondering if the lighting portion is the same just need to switch boards? Also found tamiya had a previous version sound unit now discontinued that worked with my lighting system. Don't think that's what I want though. Want to get rid of toggles and configure all lighting to receiver. Looking at the Servanauts and a couple other European units even found one with a smoke generator which I would love to do and funnel in to the stacks. Lot's of ideas. I work slow but I read and study a lot and certainly appreciate advice from others with more knowledge. May just go with the Tamiya current MFCU. Need to download some manuals and study.
Thanks,
Hotwheels