(...) My one wish would be a double concave 75 degree slope in black, and it would be sold to the public in a pack of various black 75 degree slopes. (...) Yes, that would be wonderful as well. An inside corner (double concave) like this would also (...) (20 years ago, 24-Apr-05, to lugnet.general)
(...) The 1/4 pyramid could be used for the peak of a 2 sided hip roof (in the armpit of an "L" shaped building on a square/rectangular base. The 1/4 pyramid (1x1 double convex) and the 1x1 double concave have a lot of uses besides on a roof. For (...) (20 years ago, 25-Apr-05, to lugnet.general)
