Is there any good reason to use Combo boxes with lookup queries in the design of backend tables? Or should ALL queries be in the front end?

I have a fairly large DB that was originally developed in Access95 (now using 2007). It is split FE/BE.

Some of the BE table data use combo boxes with saved queries as data source. The queries, however, are in the FE (with a few exceptions).

Should all saved queries be in the FE? If so, should the source in the backend table be left blank?

I am no authority on this matter, but I hear that you should not use lookups with the tables.

Here is one forum I came across discussing this topic.

http://www.access-programmers.co.uk/...ckend+database