Thanks for the help iron_tick, but I cannot get this method to work correctly yet. Sure, after doing a global stitch lots of my seams become a lot smoother, but then this causes gaps to appear between my patches again.

I tried fixing this manually by moving the CVs with 'snap to points' on, but I noticed that when I fixed one gap, it caused a new one to open! So if only I could now find a way to close all the gaps I would be sorted

So......uhh.......how can I do this??