edit4ever, I knew you're an expert in LiveTV on Kodi and stationed in North America. Maybe it's a little off-topic. I own a Kworld ub435-Q but it's V2 which needs Linux 3.16 to support it (whereas V1 needs only 3.14). Therefore I used it now with RPi2 with LibreELEC, which is based on Linux 4.9 or even newer. I bet it's very difficult to find ub435-q v1 now. Is ub435-q v2 also supported by LibreELEC on S905 devices?
media_build drivers mean that most of tuners that are supported in 4.13 kernel are also working with my builds.