I've started this thread as most of the other wireless dcc discussions seem to have tailed off some years ago; I hope this won't offend anyone.
I'm planning a dock side layout in 7mm and want to build some really authentic looking inset track. However I soon discovered that using actual metal check rails requires some very fiddly electrics with numerous unauthentic isolation gaps. I did consider simple battery power radio control but also wanted the charm of DCC sound. So I did a bit of research and came across a really clever chap in the US called Neil Stanton who has developed a wireless DCC system. Details at http://www.s-cab.com.
So after a few false starts I've applied his technology to a Dapol Terrier with the result that I have a loco with wireless DCC sound and speed control, and which will be able to run on my (yet to be built!) inset track without any need for any isolation gaps. Putting the various components into the Terrier was challenging but fun, as a proof of concept it seems to work.
The attached video is possibly the only video on the forum of a loco not running on any track. I make no apology as it seemed the best way to demonstrate the absence of needing any power or control using the track!
I just thought it might be of interest to anyone else facing the problems of isolating sections of inset track. And the skill and innovation is all Neil's, all I've done is apply it this side of the pond.