Here is what have happen ,
there is a company out of Ft. worth that's making a racing trucks with 2 slide out and rear doors ,from an Argosy cab-over .
i sow one on the truckpaper.com about 6 months ago
(maybe someone can get the link )
i was in the truck show in Louisville this year and Had some free time with I.C.T , learning about Expedite sleepers .
have asked the question about slide out , and given the answer that they have being experimenting with the idea for some time , and have found-out that for over the road applications the standard structure is getting too match of a beating and don't preform well over time (might be just a sell thing...)
and it is too heavy for what the costumer need .
ICT think there is no market for self develop of that project .
(the one they used in the past was from an RV sub-contractor )
they Do think that there is a market for a back-slide !
a back-slide will be a slide that work only as the truck is on park and integrated with the thief-wheel air-slide, the parking break,and the ecm.
so when you park you can used the gap between the truck and trailer for a large bed, Ext.
they think that this option is still to heavy for commercial use.
if You think otherwise ,they will built it for you...
Moose.