You could just drop an eggcrate foam mattress or two, cheap at any K-Mart type store and only takes up the space of a sleeping bag, on top of your existing bed and be done with it.  I use this method and feel little or no lumps. In fact, it creates a much more comfortable sleeping surface.  ZZZZZZZZ   YRMV.

Dave B.

On 11/09/14, John C... wrote:

Hi All,

I'm installing GL Rear Seat Cushions into my Carat.
I like them better because they're Flatter and Smoother.
Easier to sleep on I hope!

My question is What are the advantages / disadvantages
of them both?

I would like to have the seat moved forward about 6 inches
and create a longer bed.

Thanks!