Well - small update here... I don't know if you could tell from previous pictures, but my cavity in my furnace was not exactly round... I'd used a cardboard tube and it collapsed a bit when I poured the refractory leaving some flat spots in there... so I took about 3 hours and cement saw blade and rounded the cavity out! Here's a good look at the results!

(also take a look at the new blower modification I made HERE)

OK That's where I am on this one Foundry's pretty much done- if I make and modifications or upgrades - I'll post them :)