Gopro turnbuckle stabilizer mount

Helping a buddy mount a gopro in his side by side. Mounting it on the windshield which is plexiglass we discovered that first we needed a longer arm then what came in his kit. So I designed a 55 mm arm and a standard length knob. Once mounted we then noticed the plexiglass allowed a lot of movement so I decided that we needed an adjustable stabilizer to at least one more anchor point. Fingers crossed that this takes the movement out of the Gopro..