Oops! Didn't realize anyone had posted a question about this upgrade... I now *sleep* in this recliner all the time, don't use the queen bed any more. My lower back hasn't found any mattress worth having, even sleep number. But this recliner lets me snore away blissfully. It does get a bit "warm" though for me, so I put a bath towel behind my head and shoulders to let my skin breathe a bit. No model number - it was custom made at Lambright's with just the 31UL sofa platform dimensions provided. Because the slideout platform is elevated, they added drop-down roller legs to the front of each seat to allow them to glide over the floor and provide support in the front. (That's standard procedure for elevated slide-out platforms, apparently.) The final installation used the seatbelt anchors for the recliner base attachment, so there are no usable seatbelts in those recliners currently. One could add aftermarket seatbelts if desired. Very durable over 3+ years now, and great sleeping to boot!