I have no connection to this company.

http://www.machinerepair.com/scrapers.html

If you scroll to the bottom of the page, you will see a raw casting for a
25" x 3" wide raw casting that you can scrape in to use as a reference
surface. At $210.00 plus S&H it seems like a logical first step for those
that want to improve your old iron.

I figure if you can't get this thing scraped in, it is better to leave your
machine alone and deal with it's inaccuracy's.


Wes