Mine only took me a morning - just make sure you get the first upright installed perfectly then work across the wall using 3 shelves assembled to hold the next upright square and in position each time. You can basically build the whole thing floating from just one fixed upright and mark up all the fixing holes in one go.
Top tip - thanks. Mine are lower, but wider so in theory should be straightforward. The missus has sketched out the plan - I'm just the fixer.
Thankfully the majority of it will be fixed to a normal wall rather than one of our solid concrete ones which are a nightmare to fix to.
Mine only took me a morning - just make sure you get the first upright installed perfectly then work across the wall using 3 shelves assembled to hold the next upright square and in position each time. You can basically build the whole thing floating from just one fixed upright and mark up all the fixing holes in one go.