What is the problem?
Indeed , the table lowers to the level you mentioned, and there is an (optional) fill-inn mattress , which make a huge and very comfortable berth for 2-4 person.( It carries me and my wife weight without problem).To bring it back up , you get some help pulling the white rope on the mast post .In my (and others) case this rope doesn't move anything inside anymore , due to inner metal weight being 'stuck' by corossion to inner tube walls. But it can be done , with less easse , by just pulling the table up by hand, with small rotating motions.Make sure the thigtening knob is well thightened , to prevent table moving around in rolling conditions.If I remember correctly , this lowering table plus mattress is an option , not standardly found on all 29.5 's.