Only thing in vikings that is kinda tricky. To me anyways.
Is taking the ram cartridge apart. And the side winder.
Other wise the things you listed shouldnt be to hard.
Its pretty basic stuff. The switch is decently easy. Just have to have patience when lining the two pins up.
The eye replace ment just requires snaking it up into place and making sure you dont pinch it when putting the grip back on.
Take a shot your self i say.
I fight for aka.
I love my egos.