Delbert,
Thanks for asking. Still working along on it. Things have been slow because the welder on the project, my dad, was busy finishing his homemade outdoor boiler so he'd have heat in the house. I just mentioned to him the other day that the arch would need to be done by February or we'd have to boil on the blocks in the backyard again. Having him finish the boiler first may actually work in my benefit though. It shared a lot of the same principles as an evaporator in regard to draft and forced air. I'll post more photos as soon as he starts making some more progress.
Homemade 2X4 w/Flat Pan
50 taps....but always looking to expand
Mostly box elders with a scattering of red, silver, & sugar maples
Allis Chalmers C & Homemade Sap Sled