Have wired my nema 23 (3Nm) in parallel.. Wow, whizzes along now at nearly double the speed...!
Was re-checking this fault and had the y axis stall as well as the x..! Hmm.. seems the problem is getting worse now.. Spent a good chunk of the morning frowning hard at my PC, its a quick computer but have had some comments about the parallel port that are starting to sound ominous...!

Steve..