I have to think you're right. I am really surprised at how small the baggage compartment is on the 182. It smaller than the one on my Sundowner, and I have more flexibility in removing a rear seat or two without the use of tools.
I own a 182 with 2 partners and one of them installed the kit this past year. I didn’t help with installation but it seems like it was pretty easy. We did most of yhe work under the supervision of an A&P and then was signed off. Makes a big difference is what you can fit back there. I’m super happy with final product/result and would recommend to anyone.Has anyone put an extended baggage compartment in a 182? I am looking at a Selkirk model for my 182E.