A dremel with a flex attachment? I used similar porting my RGV engine. Look on the RGV forum, they've got some stuff there if you look.

Only use grindstones near your Nikosil! The cutters will chip it like buggery...Seen it done, not guilty myself.

The flex attachent is like a thick pen to use, fits into the ports itself. Keep the line fron the dremel to the cutter as straight as possible, though.

ps Lovin that "Republic of Texas" line
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The Chopster