Remove the bolt holding the sensor to the head and pull the sensor out, (it may be worth replacing the O ring at this stage they only cost a few cents Part No 90099-14018 they normally go very hard and start dripping oil onto the exhaust heat shield.) No1 should be at top dead centre with the match marks on the camshaft timing pulleys lined up with the notches in the rear timing belt cover make sure the crank shaft pulley grove is lined up at zero. I know what you mean about relocating the sensor there is always the possibility the shaft will rotate as it engages into the camshaft gear. I normally insert the sensor then pull it out to see if it has moved and repeat this several time until I happy it hasn’t moved. Another thing I do to make sure No 1 is at top dead centre, instead of looking at the position of the cams through the oil filler hole (as the per the instruction manuals) I remove No1 spark plug and insert a long piece doweling about ? dia just to make sure I’m at the top of the piston stroke.
Hope this helps