I am just like this when it comes to mechanical things.
In the last twenty years EVERY sweeper I've owned HAD to be taken apart within the first week of buying it. Something always makes me get out the screwdriver and take it down to the bare essentials. You think I'd get a clue and just return them when something isn't right, but no, I take them apart.
Funny thing about it is, I get them to work fine, but I always seem to have a couple extra parts? Hmmmm...and half the time the clicky thing that holds the sweeper up when you are done, stops working, so heh, I have to prop it against a wall.