I ran into the same problem.
HD sells 2 different bases for the tour pack.
One is tubular and the other is plate.
You need the plate one. (PN-53276-04)
On the plate mount the holes are spaced the same distance as the sissy bar mounts.
You need two QR docking points,one for the sissybar/backrest and one for the tourpac.they attach at different points on the bike,and yes they both fit at the same time.I have both on my '07 RG.
A forum community dedicated to all Harley-Davidson model owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, builds, maintenance, classifieds and more!