Could you take some pictures of these? The original should have the different shaped tags you mention, these are all the positive sides of the capacitors, the can being the common negative side.
But with the new capacitors the convention tends to be arrows pointing to the negative end while the longer lead is the positive end.
They MUST be connected the correct way round, otherwise it will end in tears
You must be certain of this before switching on.
It might be an idea to replace the metal rectifier with a silicon diode rectifier. You can ask for more info on how to do this.
Geof