Bit of overkill really . .
3/4/5 triangle in ply or nylon string (with string it can be as big as you want it to be).
Plumb line, spirit level and chalk.
Building is an inexact process.
3/4/5 triangle in ply or nylon string (with string it can be as big as you want it to be).
Plumb line, spirit level and chalk.
Building is an inexact process.