As stated previously:
I found thigh strap placement of Tim’s likewise my preference, but there is a benefit of a third location directly to the knee making the shape of the straps a triangle, resulting in a stroke much more responsive to the whole body of the boat as well as the force distributing over the fabric (avoiding a leverage stress). I uploaded some pictures and a video:
As for the glue in Europe, I finally was successfull with this stuff:
Same proceedure: rough, clean, mix, double stroke, dry to knuckle touch, heat to reactivate, patch.