I've placed double bearings on either end of my y-axis for the belt to travel over. The belt settles in to it's own path. Various previous arrangements invariably led to some level of side-wall friction. Replacing bearing fenders with double bearings, has proven a cleaner solution. Thanks to MaxBot (MendelMax) for this suggestion in a comment a couple of posts back. I've noticed others adopting this solution. Keep it in mind if you are still at the construction stage.
I've been working away and have made a few more changes including fitting a heated print bed. This quick post is just an ice breaker, getting me back into posting. More to follow.
Thanks for viewing!