Glad the new bus is treating you right padl0ck. The LS-T has a weird rating for the roof rails 60Kg max, that's inclusive of the racks themselves. I've got the Rhino Rack Vortex bars installed which are 5Kg so I can put 55Kg on the roof, off-road Rhino say to add a 1.5 safety factor into the rating so you drop to 40Kg if off road. I'm not sure if the 60Kg limit is because of the factory rails or ISUZU are being extremely conservative about their roof strength. Either way roof tents are out unless you are really light. Edit: Thanks to Matt (Ironman4x4) & Ian (underdog) see posts below for enlightening me regarding roof loadings and roof tents. Cheers.