thyname - you are up to the task, if you read paragraph 2 from @effischer:
The simplest solution is a Mobile Fidelity device called a Geo Disc; about $50 from anywhere. It isn't the most accurate but should be sufficient for what you want to do. It's a single point protractor with arm pivot point reference and precision molded spindle hole. It's a fast, easy way to double-check a pre-existing alignment.
The simplest solution is a Mobile Fidelity device called a Geo Disc; about $50 from anywhere. It isn't the most accurate but should be sufficient for what you want to do. It's a single point protractor with arm pivot point reference and precision molded spindle hole. It's a fast, easy way to double-check a pre-existing alignment.