Op the only thing I can fault your method is NOT to turn the engine "back." "Hit" the mark you want going CW, what I do:
Stick my finger in no1 hole or look at the valves if covers are off. Rotate engine, feel for compression, then watch carefully for marks and stop engine at point at which you want timing using a wrench to rotate CW
The rotor will be APPROACHING the no1 tower 'corner to corner' make sure it is not past going to no8
You have the rest. Give it plenty of advance for cam break in. You do NOT want the thing to heat up, and a clue is watch for overheating exhaust= retarded spark
