Lippert Furniture Questions ?

We're looking at TT's with bunkhouse slides and some have only the cube style module bed for the lower right bunks. Some have jackknife and others have pull outs.
We like a couple units for the rest of the TT but we don't like the cube beds.
After looking over Lipperts website and understanding the costs of a pull out or jackknife sofa we are wondering just how difficult it is to install one in place of the cube bed ?
Has anyone done this ?
My biggest question since never doing this is how to tell if it will physically fit into the TT though not only the main door but the bunk door.
Yes the dimensions of the replacement furniture needs to be exact and Lippert has many options.
Another concern is the bolting down of the new furniture as it relates to the slide room in the bunkhouse. Warranty issues too
We are looking at Keystone Laredo models and they all have what they call Cub Cubes in their bunkhouse floor plans.
Are we crazy ? Honest opinions welcomed
And on a side note anyone with the cube bed setup, are they comfortable for an adult or bigger kid ?
Thanks for any input or suggestions