Welcome to the World of Black Rocks!
First, advise Rob that your boiler is a Pensotti, a very fine European style boiler. Similar to Budureus and Biasi boilers from a land where home heating oil is about 8 bucks a gallon.
You must have a hot water baseboard or radiant system, and I'm here to tell you that you might need more boiler than the Kaa2. The little keystoker is a very fine unit and extremely reliable, well made and affordable.
DHW will drag it down somewhat, and simply cause longer 'run times'. Perhaps you might be a little short on btu production a few days a year.
There are some other options out there that might keep you warmer without any lack of btu production.
I know how bone-chilling it is 'downeast' in the 'other 3 seasons', so I'll PM you with a few options as I see them. You aren't down in Calais are you?
You might PM member 'sterlingman' up in Ft Kent who says the polar bears can't stand the cold where he is! He has a Keystoker Polar Bear warming hut ...well that's what his wife calls it.....Bob has a K-6 Keystoker and a very good ahndle on what it takes to stay affordably warm upwind of 'downeast' Member 'Klook' is close to you also, and he has a VF3000 Harman stoker boiler. You won't be alone in your desire to not pay for a 'turban of two'. Keep the money within the borders, and get to know some fine folks in Pennsylvania. By the way they have plenty of trucks to deliver their product, so 'getting product ' is NOT an issue.