Hi Sam - thanks so much for taking a look. Yeah its really strange, and the Left / Right difference is mystifying... I did think maybe it could have something to do with wind direction? We'll double check all the bolts etc, but we'll just have to carry on trying different combinations until we get there. Glad you guys have cracked it though! @ Andy, Tabb, Chris, Fabien - if any of you guys have time, would be really great to get your expert opinions on this… we're at a bit of a loss.