Microlighters

Any advice on how to fix a wing drop to the left when stalling the wing? The wing is a Windlass streak and was misbehaving badly previously, then took it to Yenya who ironed out most of the nasties but this one is persistent. When stalling the wing the left drops away first necessitating a quick and heafty correction on the control bar. What do you blokes think?

I know somebody was mentioning that the trailing edge not being symmetrical or shaped the same way caused by batons that's bend to much on a side and lovelines that's not exactly the same length on the left and right side could cause a wing drop to one side...

But that's just speculation