Changing stuff like swapping the bezel, bezel insert or the complete movement including dial and hands is easy plug-and-play.
Swapping hands needs a steady hand and some tools. My mod above was done with the "improved watch mod/maintenance tool kit" from www.10watches.com
The best way is of course to get one or two scrap watches for a couple of dollars to fool around; then you don't slap yourself if you scratch a dial or bend your seconds hand. Damn things are tiny.