I just got a report this morning on the Harman testing.
Firstly, there was some delay in getting the control installed because our tester was assisting his wife, who had surgery... (all is well with the surgery).
The Coal-trol was installed on Thursday, 11/9 and I assisted (by phone) in setting the minimum and maximum feed rates along with the stroke adjustment.
The Coal-trol Control Module was attached to the same bracket holding the Harman control box. All motor cords easily reached the outlets on the Coal-trol Digital.
The report so far is that it is working as intended: excellent temperature control, and good convection blower behavior.
The minimum fire is so low (a 1/4 moon shaped fire less than the width of the grate) that I expressed concern about adequate draft. The tester remined me that he has a chimney with draft inducer, so a very small fire should be OK.
The weather in south central PA has been quite warm. so we will let it go for a week or two more before reporting "final" results.
At that time we will have pictures of the installation and will pubish details on intallation recommendations and thermostat one-time settings for Harman.
Thanks for your continued interest.