Andrew
The lightest tent is about 95 lbs. The heaviest is near 150 lbs. Most vehicles have a dynamic roof weight rating of 150lbs. or less - in the USA. Other countries it is more - sometimes a lot more - for the same vehicles. What, in your mind is an acceptable weight for the top of your 40, 80 or 60?
You are right. My FJ60 is only lifted about 3" with the OME set up on it. If the truck was lifted with SOA it might make a greater difference.
Here is a 'hard shell' unit on an FJ55...
__________________
'96 FZJ80, locked, Hanna sliders, ARB bumper, Kaymar rear with spare carrier, 45 gallon Longranger aux fuel tank, OBA, Hella 4000's, OME lift, 285/75/R16 Revos & AutoHome Maggiolina rooftop tent, etc.
Custom Cruiser trailer with OverLand tent
www.AutoHomeUS.com
TLCA Member #14874