Hi Edward
Laid out, open plan on the desk your Sieg SX2.7 will be working fine and dandy, I believe they always do. All the data lines are clear, it is not interfering with the telly.
It is only when you start putting things in metal boxes, using screened cables and connecting everything to ground things start to go wrong.
I don't know if anyone sees an improvement. If not our idea of how to do it may be flawed.
Robin