Help with Visual Mill 3.0 and Sherline

Since it is a free download I am attempting to use Visual Mill 3.0 to
generate G-code for my Sherline CNC Mill. I am using TurboCNC to run
the G-code. The Turbo CNC is working just fine and seems to be
interpreting code perfectly. The problem I am having is with the post
processor for Visual Mill. It seems to think I have a mill where the
table rises to present the work to the tool and generates positive Z
values to bring the tool to the work. I can manually go in and search
and replace the +Zs with -Zs but would like to identify a post
processer that will drive the mill properly. Before I went throuh all
50 or 60 files one by one to try them I wanted to see if anyone else
had solved a similar problem.
Thanks in advance,
Bruce Buchner
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