Yeah, I’ve definitely wished for that, it’s a pain to carry around since it’s both heavy and awkward. There is actually already a pair of axle holes on the back - you can put the wheels there instead of the center for pulling the trailer by hand, but you can’t do that if the wheels are packed away. You might be able to jerry rig inline skate wheels with the same axle without waiting for a new version, but I haven’t gotten around to trying that.