That's a good point, Dale. They can't even handle tangency consistently (too many cases cause sketch elements to flip or get strangley overdefined) I just don't expect much from D-cubed - they, um, er...how do I put this delicately... um... they suck.
Gil, if you want to make an enhancement request, I say go for it, but I suggest that you make a strong business case for it at the time of your submission if you want any action on it. To SWx, you have a viable, yet cumbersome, workaround. If you can explain how you and loads of people in your industry need to make 2D spirals day in and day out you have a better shot at getting a proper hearing. As for me, I have only used a spiral once in my 8 year SWx career, and it was a 3D tapering spiral. I am not going to say that my experinece trumps yours, but I work for lots of different people across a bunch of industries and it just hasn't come up. You need to make SWx understand that it's important, persistent, and effects a lot of folks or they will backburner it (unless it's really easy to implement, like skins, which are frivolous but were added -as I was told by a VERY reputable source- by a developer on his own time on a weekend because he/she thought it would be fun) Good luck with your request, Ed