Here is a pic of my stove with new fire brick installed.
I have a good tile saw and could cut the angles on the edges of each brick for a perfect fit but can't figure out the correct angles I will need.
Bricks are 1 1/8" thick and 4 1/4" wide. The round steel liner in the fire box the bricks fit to is 17 inches accross. I have 10 full bricks in there and that leaves a gap of 2" on the steel side and 1 1/4" on the coal side.
I don't know if this is necessary or if it would even make any difference to close the gaps. Just my anal nature and desire to make a job look and fit right. I also thought about refractory cement but that would make for a difficult repair if I ever crack any as I am sure I will.
My other option is to draw a 17 inch circle and start playing with my bricks to get the angle but I am pretty sure there must be a formula to figure this mathematically. I believe I might have slept thru that class or cut it alltogether while at the Woodstock Festival.