Well, after 6 days and 20 hours +/- I finally filled my water jacket to the top of the fill neck. I only run about 55 psi on my house water system so that kinda slowed things down, this RO filtering system is good up to 85 psi (rated at 100 gpd at 85 psi). About 180 gals of filtered RO water plus a half gallon of boiler treatment in the system now.
No fire yet but I opened my valves, filled the lines and started the pump. It was squealing a little so I cracked open one of the pump flanges a fuzz and bled the air out. That quieted it down, can't even hardly hear it running now on high speed (Grundfos 15-58). Circulated water for about 30 minutes with no apparent leaks.
Running more RO water in right now to top off the tank again.
Building a 90 degree turndown that will slip over the horizontal flue pipe that extends onto the fire box. That should help retain the heat a little better and not allow the fan to blow as much heat right out the flue (I hope).
Will probably light 'er up this weekend, March 17 will be a year to the day that we cut the propane tanks and started the ball rolling on this caper.