One should not ever totally remove the "long screw". It can be difficult to get it back.

Ok. You should release the "long screw" justabout 5 millimeters and hit with hammer. This will release the expanding block which allows handlebar height adjustment and also removal of the handlebar. Incredibly few people know about this astounding fact.

Prediction: Dave will totally destroy the handlebar assembly with brute force and invent some explanation. The expanding block is still stuck there and the only way to release it is described above.

Did I mention that if you remove the pedals with hammer and chisel, the precise surfaces become mangled and twisted and the pedals become "clickety". Very annoying, and you cannot really fix this except with new axle.