Pardon?
what method is that, you cant measure any lift from behind the vernier, and you cant set cams back to zero, unless you mean zero degrees on the crank.
TO put it simply, you put the engine to TDC on the non firering stroke, basically the exhasut stroke. Then the cam company SHOULD list the lift that the cam gives at TDC, if not you have to work it out or email them.
Then you set the cams up, place the dial gauge up on the top of the tappet.
For the inlet you zero the dial and rotate the engine backwards, when the valve is fully closed, read the dial and it will give you the amount of lift at TDC. If its not correct adj the vernier, advance the cam clockwise for more lift, and anti-clock for less lift.
The exhasut is the same but you turn the engine forwards to measure lift at TDC, and you move the cam opposite ways for lift adjustment.
Simple eh!
No more checking protractors, no more taking the engine out, no more messing about!.