I meant 5 different kinds of metal.Someone cannot count to 5.
I currently have 3 (Aluminum, Brass, Copper).
I have an SS one in progress -- that will make 4.
Titanium would make 5 -- a quinfecta.
I don't count the 3 different types of aluminum alloys that have been offered as different metals. I currently only have two of those. To get a "perfect score" you have to have one of every material (including the different aluminum alloys) that have been made so far...