Although I really like my slides and wouldn't have a motorhome without them, I'd be very happy if my big slides in the front only slid out 18" each. This would do several things, it still opens up three feet in the middle of the living room, when they're closed there would be a little more room to move around inside, they wouldn't be as heavy, and the shorter movement would make the mechanics much easier. On my Tropical my drivers side slide is 36" and the kitchen slide is 22". 18" on both would work just fine for me.