I currently have a GFC Topper with beef racks. I am going to be putting Roofnest Condor Overland on the topper. I want to use the GFC quick release mounts with the Roofnest RTT. Does anyone know if this will work?
the product page for the quick release says " THESE ARE NOT COMPATIBLE WITH NON-GFC RTT PRODUCTS." 
I’ve also used the GFC quick release mounts with the Roofnest Condor Overland and it’s been a great experience. The mounts are very well-built and they make it very easy to install and remove the RTT.