Ok here is a small contribution if you have a rack that has 8mm and 6mm mounting slots that will save you some money if you tie down a lot of stuff on the rack. For the K9 and Frontrunner, I believe the eye nut kits are around 10 bucks or so for a pair of 8mm. You can make your own so much cheaper
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Buy eye nuts (links above) and add nylon washers and 1nch 6mm or 8mm bolts. Job done!