I could imagine it did!
I tried initially using full size sheets (the ratio ones have the moulded multiple layers per sheet I only made it one layer high, but full width).
When that wasn't working out great, I did try full sheets, but the creases were not uniform enough, so I made a jig (like it suggested in the MR mag) and cut the sheet down in to smaller sections (like the size you have done)
Baring in mind my building was about 400mm long and with the roof, about 200mm high, I gave up quite quickly in favour for the sheets themselves. A more expensive approach and the thick sheet looks rubbish at the ends, but so much better over the width. I would have had to have spent a few days making everything in foil!
I did originally try using tinfoil but it didn't pan out so well so I brought some of them thick foil takeaway dishes in the end.....They have now been upgraded to become balast and flock containers!!
I've gotta say you have got the creases much neater than I managed, but its the getting it all stuck down neatly and aligning the panels without damaging the creases that put me off fully in the end!
Top marks to you for pushing through to the end with it! It's not as easy as the mag suggested!
Regards
Lee