As cheap as it gets, see link:
http://www.patwarner.com/cutter_depth.html
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I have my router mounted to the underside of my portable workbench as a
crude router table. It works fine, but I would like to upgrade it a bit by
installing a router lift that would allow me to adjust the bit height from
above the table.

Are there any inexpensive ($50-$100) router lifts that are of decent
quality?

Anyone used the "Router Raizer"?

There's nothing fancy about my table, so I don't want to spend a fortune on
a lift...

Anthony