No dramas.
The system should have been tested. I was told that even though the system runs at at ~600 PSI, the lines are rated to 1200PSI+. You would think they would have tried it, but not a concern now that the heavier duty actuators are fitted.
(Imagine how I felt with a 400L bladder of AVGAS in the back, just starting a 1400nm leg over the Arabian Sea when you get a burning smell from the gear pump!)
Be aware that many GA twins, while fitted with de-ice are not certified to remain in icing conditions (ie. vacate ASAP). Navajos, for example are only certified in MODERATE icing and that's only if every part req in the POH (antenna shields included) is fitted and working.
Haven't fitted a radar YET, but the Viator will have underwing pods that can be used for fuel or sensors/cameras and they can be fitted to P68s. Should be able to use for a radar as well.
Sorry 43: my response was on the comment that the demo model didn't have de-ice. That option only comes with the turbo models as far as I'm aware. (Believe it or not normally aspirated Senecas had a de-ice option that held the boots in the retracted position with suction, but usually you need a turbo, turbine or press. air to provide the inflation.)
It's unfortunate the industry hasn't come up with anything piston to replace the C400 series/PA31's. If you're carting anything more than 5 adults total and gear, you're going to have to consider 8/10 seats.
Cheers.