Some chains

I've been relying on simple parametric parts for a while, but sometimes, a chain is what you really want. Today, I fiddled around in FreeCAD and whipped up some chain designs (simple loop, attach a hexagonal sketch for the sweep, draw a curve and path linked arrays (one aligned normally, one frenet alignment, simple stuff). These ought to print out as single models, and give you a nice chain to at least start with. Scale accordingly, fiddle around and see if you can repeat/chain them together if you need anything longer.

Unfortunately, I've not been able to model a chain in as efficient a way as possible yet (getting the offset angles right is a PITA), but for someone looking for a quick model of a generic chain, these should do the trick nicely.