Thanks, everyone.
So, patko, I gather poly alone should work -- I'd just multiplex messages, so long as there are two arguments?
Hans, I gather the Rj version u_makepoly is now the newest. It's looking great, though I ran into one hitch - right now, with the abstraction I built it's giving me this error - Error: Bad arguments for message 'f' to object 'objectmaker' f $1 ... couldn't create
Not sure what that means. (I mean, I know literally what it means, but not why.) Looking into it / open to someone pointing out anything obvious. ;)
Peter