Rather than use the brass captured spigot off the side- I had an wider aluminium spigot machined down at the end, (off a 2k as it happens) so my Hill docking bracket would be mounted over the centre of the post as opposed to being offset, (safe but looked scary).
Dimension of the new spigot is 15mm and is a perfect fit for any Tiffen or Hill docking bracket. The other end of the cap is the standard 30mm lighting stand diameter.
Any questions, please call Joe on +44 7791 212263.
Happy to ship from UK, please call for quote.
Thanks for looking.