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Clever!Looking good Andy.
For the bulged side windows, try the soda bottle "conversion" which I experimented with, and would have worked if my hands hadn't given up working properly.
Some soda/pop bottles have "bubble" ridges around the base, and if carefully cut to match the canopy aperture, they're ideal to make the "blown" side windows. It'll probably take a couple of attempts, but it can be done.
Look for the smaller bottles, I think mine was a 500ml "Fanta" bottle.