As for the determination on the oil can portion.. Have they actually decided that it has the same qualities (legally) as a baffle stack? Or is it just up in the air still? (no determination made)
There are numerous letters limiting the material that wipes can be made of metal is expressly prohibited. The oil can does not have its own letter yet. Where are any of the serialized adapters for sale I couldn't find any a month or two ago while I perusing.