Been playing with getting 'big' server up'n'running now cables are made up to new dish.
Had tried getting the sat>ip function in TVH working couple of days ago without luck on a testbed but when I powered up the old 'new' server I set the sat>ip in motion and was surprised to find screen below - up to11 tuners available
Tried a few from the main box, all OK, then started opening transponders to kick the sat>ip ones from exported server into action - all working!
I'm hoping that recording to the 'prime box' i.e. '98' will work with the sat>ip tuners. The big server is much more capable than the TX120 in serving network (it should be, it's an Proliant ML10..) and is also handily in the office, warming it gently.