Dave,
tiddlytables read its data from tiddlers! Each row is a tiddler and each column is a field!
So if you have Tid01 with fl01 and fl02 with values bla and bla yes It makes the table for you on the fly!
There is example for table in table and you can simply make any number of nesting!
It really worth to put an hour and learn it.
--Mohammad