Here is my obligatory post stating I read the entire thread and am now working on gathering parts. I have been using an electric ECB for the last 4-5 years with a BBQ Guru successfully, but it is no longer big enough.
I also want to switch and try charcoal as a heat source as well, so UDS it it. I guess I could always use my heating element from the ECB if I run out of charcoal :)
I'll call it a dual-fuel UDS.