It's the sort of thing that's got me thinking that the next time I need to build a garden shed I'll give it a go. Anything that doesn't need foundations, like a deck with a roof on an existing concrete pad, or similar, I'd give it a go to get some experience with it. Round here that wouldn't need planning permission so it's comparatively low-risk. Just need to make sure whatever I did to replace the ties into the foundation blocks was suitable, but that doesn't strike me as beyond the wit of man.