I have a SWM system with 3 HR23s(bedroom,game room,guest bedroom) and 1 HR24(living room). The 3 HR23s all have DECAs attached with another in the basement connected to my router for whole home dvr and internet. I have been using powerline to supply internet to my living room, bedroom and game room. In my bedroom I have another access point in bridge mode to increase my range. This has been working OK but has limited my Mbps to only 32Mbps or 4 MBs. Last night I was bothered by how long my backups were taking and thought about how I could use my coax instead of the electric. I hooked up a switch to the bedroom DECA and plugged the access point, appletv and directv box into it. This did increase my speed on the transfers to 80 Mbps or 10MBs. I was happy with this... Now for my questions.. 1. Is this a bad idea? What problems can come from using the DECAs like this? I did watch a move from the living room in the bedroom while backing up my Mac and didn't notice any issues. 2. Can I add a DECA to my HR24 and put a switch there? My plan was to put switches in the living room, bedroom, and game room. Will this amount of traffic over the coax be bad? 3. If I shouldn't add a DECA to the living room HR24 can I split the cable and then add it? 4. I notice that sometimes the speed drops down to a low 8Mbps or 1MB. It's usually faster than this but it has at times stayed at that speed for some of the backup. However if I trigger a speedtest(.net) it once again kicks up to a great 56Mbps or 7MB. 50Mbps is what i pay for. Is this normal? 5. Is there any QoS on the DECAs? Will transfers be slower if I am using my Whole Home DVRs or watching an On Demand movie? Thanks for any help!