Yes, in each corner I will rest/support the 4 posts on top of the bottom bunk which is a wood frame. I intend to use drywall screws so I will first drill pilot holes in the wood.
Re. contacting the manufacturer, I wouldn't even try contacting Cruiser. From all the posts I've read, I wouldn't expect a response.
I am very careful and have never exceeded the weight limit. Thanks.
2007 X160; Nissan Frontier 2016 6cyl