Here you go ...
Don't pay for HeliCad- it's free now.
Release 2 is tested on AutoCad 2004 and earlier. Let me know if there are problems on later releases.
Kenhttp://files.engineering.com/getfile.aspx?folder=8ba45fad-c6d2-4391-ad78-5a51dbabb499&file=HELICAD.zip
Sorry for the confusing post. I wrote HeliCAD a few years ago to satisfy some specific client requirements but lost most contact with users due to the emerging significance of 3D parametric modelling applications, company name changes etc.
Just letting anyone who might still use acad for 3D...
HeliCAD (vlx slb) was released by a company called Monash Engineering (Australia) a few years ago for generating 3D fasteners and springs in AutoCAD 2000.
The program is still available if anyone still uses acad for 3D- just email me. I have removed the timer to allow unlimited use.
Apologies...
