So… Ordered Isotta black aluminum topcase rack and bag for my 2016 K1600gt. Due to the fact that my topcase doesn’t have the bracket / trim that allows for brake light installation, there’s nothing for the rack to hook onto - My case is smooth. The Isotta doesn’t require drilling to mount. Wish I could make it work - I have the pannier racks. I am listing rack and bag as a package deal. Never used, never installed. 275.00 plus shipping. They were 315.00 plus shipping…