Soldier course

[csmeutah]

So after many years of lurking and talking to Russell, I finally thought I would take advantage of this time at home to get on with the oven proper. I have laid the two layers of insulation and the oven floor bricks. I am struggling with the soldier course. From the spreadsheet I am cutting 5.2 degrees angle on the narrow sides of the standing bricks but this angle is clearly too aggressive. How am I to interprete the "Side Angle" column? is that total degrees? should it be 2.51 each side?

Also, am I adjusting the IT based on the "Inner Radius" column or does it remain at 22?

Thanks in advance, got next week off, hoping to get some of this done...