FWIW, I installed the Vision's trunk luggage rack today and noticed that the marked pilot holes do not line up exactly with the rack I received. The instructions tell you to drill from the buttom (at the marked locations), but if I were doing it again, I would do a dry run with the rack on top and drill from the top down to get a perfect fit.

I also bought the Kuryakyn standoffs for the GL1800's rack. The OD of the Visions rack and the ID of the GL1800 standoffs are both 1/2" so they fit. The bolt hole in the GL1800's standoffs are smaller than the Vision's rack holes so I had to mill out the Kuryakyn standoffs to allow for the thicker bolts. Since these standoffs raise the rack by 5/8", I also needed to get 4 longer bolts to accommodate the extra 5/8". The Vision's rack bolts already come with some blue lock-tight on them so I added some blue lock-tight to the new bolts (the removable lock-tight).

The 5/8" standoffs give you a little more room to get under the rack for cleaning and they also have a wider footprint which spreads some of the weight across more real-estate on the trunk lid. All, in all, it worked pretty good, but milling out the standoffs can be a pain if you don't have the equipment.

ONE OTHER NOTE: Install the wrack BEFORE you install the Vision Trunk mirror. The Vision's Trunk mirror is held on by double sided tape and there are 4 bolts under the mirror. You need to remove these 4 bolts to install the rack. If you already have the mirror installed, you might break the mirror trying to unstick it from the double sided tape to gain access to the 4 bolts.

HTH,

Tim