cam degree & piston to valve clearance

Im trying to understand, so once i've degree the camshafts to the manufacturer's spec, i will need to take off the cylinder to measure the piston to valve clearance with playdough? And as long as i've locked in the allen head screws to the adjustable camgears, i wont need to readjust the degrees if i re assemble the cylinder head for doing the piston to valve clearance procedure?