I have only known to ground directly to the splitter.. Thats how it is around here. Never failed a QC for not using a GB. Hey from the explanation it does make sense to me and I agree with it. We just are not required to go through a GB before a splitter, or isolate HSI in this system..(the only one I have worked)
This is CABL.com posting #279028. Tiny Link: cabl.co/mbkKC