thanks for the suggestion. i think part of my reason for not going with the more professional grade CAD tools is that they are extremely expensive and thus somewhat out of reach for hobbyists. I know that in many cases there are exceptions to get free or discounted licenses but I do feel like its not the same as something that is truly open source or even very accessible like Eagle CAD. I was peripheraly aware of FreeCAD but hadn't looked at it in a while. I'm definitely at the limit with regards to what I can do in blender so I will certainly check this out. As an asside, do you happen to know if FreeCAD can do machine screw and/or tapered threads? From:"Steve Traugott" <stevegt@xxxxxxx> Date:Tue, Feb 10, 2015 at 7:16 PM Subject:[AR] Re: Open Source Igniter / Rocket On Sat, Feb 7, 2015 at 6:53 PM, Redacted sender gnsortino@xxxxxxxxx for DMARC <dmarc-noreply@xxxxxxxxxxxxx> wrote: >>Sorry about Blender, I used solidworks and it has a nice helical sweep feature Thanks for the info. I need to get away from Blender but I’ve gotten used to it and can’t seem to kick the habit. Not to digress (who, us?) but FreeCAD has gotten quite good in recent years. It's pretty stable now (you'll still want to save often though) and while it's not quite solidworks yet, I now think it's a safe bet that it will eventually become a defacto standard -- I just wish they'd change the name. Otherwise, I'm still using OpenSCAD for most things, out of inertia. I had high hopes for BRL-CAD a few years ago, but I think FreeCAD has taken that space. For anyone who likes scripting parts like in OpenSCAD, but wants to use the more capable OpenCASCADE engine (FreeCAD's backend), there are a few options. One is CadQuery, which uses FreeCAD as an IDE or can be run standalone with no GUI, such as from a makefile. Steve