Benro Korte kolom FIF28, FRHN24 & FBAT24 voor Benro iFoto, Vleermuis en Rhino Statief

I'm shocked that these can even be sold by a company like Benro! Yes, it fits my Rhino tripod as advertised, but there is absolutely nothing to prevent the short column from slipping out of the tripod collar when carrying your equipment around. All this needs is a simple screw and lip which screws to the bottom of the column once inserted into the collar which would prevent the column from sliding out. But there is nothing available (Benro or otherwise) As it is supplied, it's absolutely useless. Very disappointed.