year or so back deltas were the new way to print. There were big ones, small ones and cheap ones. Ones big enough to print an ali-**** urn and ones small enough to balance on your head.
Commercial ones, emclosed ones.

Now they seem to have more or less disappeared, lot of kits around. But no company seems to be making fully built ones any more.

So what happened ?

Okay, what's wrong with b a b a ? That's what the asterixes should say. In what language is that a rude word ? and what does it mean - 'cos it's a new one on me.