To Explain the "backing" or "backer"
Our floors are plywood topped, with aluminum framing with foam in between,
Where the current couch is located, we make sure we put an aluminum framing member in that spot so when they lag the couch down they hit a backer or aluminum frame. Otherwise you are just screwing the couch into 1/2" plywood.
So, if you put the recliners in....they attach in different locations than the couch does. So in effect...you are not hitting metal (unless by accident) you are simply attaching the recliners into 1/2" plywood. While this may seem OK, it is not, if there is an accident. 1/2" plywood will not prevent those recliners from moving in a collision. All furniture must pass a pull test equivalent to 60 times its own weight (simulating a collision).
Because this is a new design, there is no backer/framing member/attachment point that would work for existing units. None in the 3050, 3010, etc, etc. The recliners are designed to fit in the spot to replace a 68" sofa ON a slide floor. Basically the legs are cut short...the lift up leg portion actually hangs down in front of the slide floor so that your feet rest on the regular floor and not the slide floor. If you take the kick plate off of your 3010 sofa you'll see what I mean. The sofa is built the same way...we hide the slide floor by giving the sofa teeny, tiny legs and then cover the front with a kick plate so you can't see the slide floor.
The 3050, the sofa is not up on a slide floor, so it would need a recliner with normal leg size.
having said all that...will it work? Sure. But in the unlikely event of an accident there is no guaranty that the 1/2" plywood would hold. We cannot take responsibility for that. So if you retro fit your own unit, the liability is yours.
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