> I wonder, if the charcoal grate from a 18 kettle is good for a "cross hatch" charcoal grate in a wsm 18, would perhaps a charcoal grate from a 22 kettle do the same thing for a 22 wsm?
On the rare occasion that I use lump, I use a charcoal grate from a 22 kettle across the wsm charcoal grate to contain the small chunks. It fits well inside the ring.
Note that old, well used 22 kettle charcoal grates tend to droop and won't lay flat, so you may have to invest in a new one...