In a message dated 99-05-17 10:36:33 EDT, ron@NETCARRIER.COM writes:

<< The Westfalias have a flat plate welded across the seat base, with a
 circular indentation that the swival mechanism sits on.  This base is very,
 very difficult to remove from the camper without butchering it, so typically
 used seat swivel assemblies are sold sans this plate.  >>

i use a circular cutoff saw to cut the base off at the welds - and when your
reinstall you just re weld where the cuts were made.   you can make a very
clean cut with a cutting wheel, without any damage, and its very easy to
remove the bases.

like my grandfather always used to say... "Use the right tool for the job,
and its less work"

chris