Rhinochugger
Retired Oik
I wouldn't remember anything from O level geography (failed) but I'm sure it didn't contain anything as interesting as contours and maps ............. but I get the idea; like itRemember the contour models we made in Geography, with a new layer for each contour line? DJB (see above) did a similar thing to achieve the tumblehome on their plywood coaches, ie stepped layers under the final skin. It worked perfectly.