Carbon_One: Question: Unless I am missing something, it appears you used some sort of clamp to mount the luggage rack to the 3/8" bolt. Can you elaborate on what you used? (i.e size of that clamp and how long are your 3/8" bolts?) Thanks for your time as I am trying to copy you. I have the house tuning clamps and I have ordered the Reese roof top carrier. I just need to know where to go from there to mount rack to the house tuning clamps.
I used a 1/8 " thick x 3/4" wide piece of stainless steel bent into a U shape to slip over the round tubing of the carrier. It has to be long enough to have a 3/8" hole drilled for the bolt to go across to the House Tuning P clamp. Due to the Twist top being wider at the rear than the front I add a 1 1/2" spacer in the front of the car top carrier. Look closely at my 1st post to get a better idea here.