Think I'm going to implement two things to address this, a stand-off like redlined600 mentioned at the rear of the trunk...and a stop to the trunk hinge like ROADRACER mentioned. I didn't understand what he meant until I watched this video for another brand wing and then I understood. Watch 1:10 - 3:30
I think the combination of thse two supports will limit the movement quite a bit.
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2020 GMC Canyon Denali Duramax, 2021 Forester Sport, 2000 Subaru Legacy B4 RSK 5MT (JDM Import) and random 86 chassis rebuilds....