I've been poking around for a while. I've been burning a hand fired Godin stove for many years. Last year was it's last. The brick lining needs to be replaced. I decided to retire this old friend...
I bought a used DF520 last fall, and spent some time repairing and installing. The tips here have been most valuable. I installed it inline with my oil boiler and it's now keeping the place warm.
Friends and family were asking lots of questions, so I created a Youtube.com video explaining some of the details. Here it is: https://www.youtube.com/watch?v=hQGRiWjI1Kg
Any questions or comments are welcome. Thanks to all who participate in this forum, - I picked up lots of tips here, making this installation go well with very few challenges.