Now fit the base plate of step 1 onto the other parts, using the 3 T8 screws.

For the time being, do not tighten up the screws completely, just enough to hold all the parts together. This will allow you to gently lift the short hair trimmer with your finger - the knives will move downwards.

Now a step where you may need some extra patience: take the small spring, insert it into the groove of the short hair trimmer with the 2 ends, gently push it and insert the spring winding into the upper groove of the cast part.