I have a crufty old version of DesignSpark PCB.
I'll have a look at
Mechanical.
It's basically SpaceClaim that's been tweaked to only output it's
native
file format and STL files.
You should
also do your design work in metric if you expect to be having
parts printed. Scaling isn't a practical solution because it can introduce
problems depending on the slicer used.
I can export in metric, but the DEC designs generally don't make much sense
unless you're doing them in power of 2 fractions of inches.
Everything is 1/8", 1/4", etc.
The problem is that the toolchains for 3D printing are all (or at least
all the ones I've seen - which is a lot) metric.
g.
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