bike trailer??

Hey guys. well i was looking on ebay today and came across this trailer that someone has made for their bike. has anybody made or have one?

Im interested in making one now that im in my summer holidays.
give myself a project?

Thanks for any info
Duncan

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How about an enclosed trailer to make it all weather trailer or with a removable enclosure? something like a convertible with foldable roof?

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It's more than a hobby, it's my transport.

Caution: This hobby is habit forming.