I have a question regarding metal wheel+arm set for Pz. III. I just get it and it seems there are some parts missing. As You can see below in attached photo, only two of the wheels had those three small screws in, all other wheels miss those screws. Without them the two wheel parts seems to be a bit loose (not hold together well).

So now question is, if that is normal, that screws are missing with those sets? Or where I can get such small screws?
THX all.