(this is my third time trying to reply... I think ether me or the computer needs more coffee!
ALL good questions and this is the forum I bet you can get some answers.
This is my first winter with our lovely PC 2350 (can U tell we
love our PC?) So my only experience is with the Rialta. Now the Rialta procedure suggests to just blow the lines out with compressed air 35lbs or less. That seemed to work fine for me. Then when one wants to go on a moments notice, "just add water" and go.
I have also used the heater to keep everything cozy inside. That worked fine also, but I wondered about the cost of long term use. (I live in N Wisc.) Would maybe even have to use two heaters when it gets below zero.
My only concern with the 2350 is the mercenary pump. I would agree no matter what procedure you use, one would have to not forget the pump and run antifreeze thru it.
I am also interested in this topic as we would like to "blast off" in a moments notice, so will be interested in what others have to say..
Denny and Barb