Hi Jason, you're welcome and I'm really glad that you like MoI! 
 
> Just curious, do you have any ideas to draw this roud-shaped 
> stainless steel wire(7*7) without the "flow and twist" command? 
 
Well, that's a good example of the kind of thing that would be quite difficult to do without flow and twist... 
 
I suppose it would be a matter of constructing the proper path curves and then doing a sweep around those, but it would really require a lot of effort to manually draw the curves for those paths, as compared to using the new flow & twist commands to make them. That's why making those new commands has been a priority for v3 so far, since they really simplify certain kinds of constructions like that example. 
 
Without flow and twist the next best thing would probably be a script that would generate the paths from some program code. 
 
     - Michael 
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