Starting to get the hang of it. I think it’s about time to start the entry arch. So far I have cut everything straight from my model and drawings. I’ve only used the IT to maintain the proper inward tilt of the brick. I have been using an adjustable square to measure the height from the floor to the top inside edge of each brick to maintain my mortar joint per my drawing. This will insure that I finish where I expect and keep my final keystone plug predictable.