Timing way off..help.

Did you us a piston stop ? Or were you just rotating it the same direction and check the mark each rotation ? It will never change on a single overhead cam engine. It will change on a double overhead cam engine with a belt. They are checked differently.
I rotated both directions but only used a mark on screwdriver to see it went to same spot both ways..I know not exact but shouldn't that be enough to see if it was off?? If not do I have to make the tool??
Maybe you could send me the other link..maybe I'm misunderstanding the correct procedure...I'm bike mechanic..but had tbi and my thought process is different...but I fight threw the frustration.lol.. thanks again for bareing with me