Did you acquire it on line or from a particular retailer, Richard?I have both the Olfa scriber and a MAD one for fine scribing that will work for 1/87 Rick. It keeps it edge and used that to rescribe the planking on the Constipation. Easy neat and no furrows at the sides to clean up. The plastic is cut out in fine spirals. You can cut a deep trench the thickness of the blade if needed. For 1/87 just apply light pressure when cutting.
Cheers,
Richard.