I've been using shark cad v12 for weeks now and some things just don't work. I needed to design a bevel gear and finally was able to create one. In then out of curiosity I went to the gear guide to review power pack , gear option . and I found out that the spur gear options has a cone angle option. When I went back into the program to use the gear tool NO cone angle was there. I emailed Todd but as yet he has not responded.