<amadornes> raoulvdberge, a couple of things: first off, you can export "invalid stacks" with an interface
<amadornes> so you can get stacks of more than one RS upgrade
<amadornes> that, and replacing the exported item (a crafting upgrade) with a normal stackable item (a machine frame/casing/whatever from EIO) made it dupe
<amadornes> basically filling up the stack to however many machine frames I had set
<amadornes> but with crafting upgrades
<raoulvdberge> hmr
<amadornes> I tried to reproduce it, though
<amadornes> and only managed to do it twice out of the 5 times I tried
<raoulvdberge> of course :D