Hi we bought a universal bedroom annex of ebay last year for our issabella commodore awning until we could save for the real thing.
It did do the job. Light weight fabrick easily put up and adapts to all sizes of openings. pegged out well and stood up to strong winds.
Negative side light weight material usually in pale colours let the light flood in so as a bedroom for the kids they woke up earlier. plus in heavy rain the seems did tend to leak but soon resolved with a cheap tube of seam sealand available from any tent / camping centre.
overall well worth the
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