When you put the gear back in, make sure it engages with the gear on the cam shaft.
Then put a 90 degree feeler gauge of 0,55mm on top of the gear and then press down the bush. Maybe you'll have to tap it down or use your freezer spray to make the bush smaller.
You can make your own feeler gauge with 0,5mm piece of tin or thin metal. Just bend it to 90 degree.
Either way, the gear must not be too tight against the cam shaft. There has to be some play for movement.
I made a little mistake before, the gap is between 0,15 and 0,55mm. (not 0,45)
Good luck