Job almost done

Several years ago our Mountfield cultivator stopped working due to the drive dog breaking off inside the end of the crankshaft.
Today I decided to get on with a repair.
Drilled a hole in the old part and removed it with an eazi-out, drilled out the end of the crankshaft to take a bigger bolt and tapped the new thread.
If I had a 25mm long M12 bolt I could have finished it.
Trip to the bolt shop is called for.