Hello,
i explain you here with some pictures a technique I use myself to remove correctly a hands of Klickys.
Use preferences recent figures, the plastic is more flexible than the old. You can too also warm up before the arm with a source of hot air, like hair dryer, heat gun, radiator, etc...
Important: Be sure that the new hands are the same as those to replace, because a part that enters in the arm is sometime different (Bigger, smaller, longer, shorter).
The rest follows with the pictures because it is sometimes better than write too much and my english is a little poor.
Friendly
TJ