Im tring to find some more bases and fittings like this base . Does it have a particular brand name, and more importantly , can you still get them. happy to by second hand bits 
the reason being that I have 1 beginners board, and 2 landboards all with the base plate, but only 1 mast fitting. I want to set up 3 different sails to suit different beginners on the water board, and on the landboards, If I can get another mast fitting then we can have a race!!!!!!
. could also set up the other water board for lighter learners
I dont want to be buying new gear till we have got beyond the wrecking stage on the landboards. money is better spent on daughters lessons. she is graduating to a harness on her next lesson
It looks very tyronsea, certainly the pulleys and clamp are. The base works on the same principal with 2 stainless rods going into a groove around the insert, but diameter looks too big. The old tyronsea that I had used a brass insert.
One of the Perth shops is an agent for tyronsea fittings, they may be able to help. Think it might be Stuart Bell
Just googled tyronsea and it's not Stuart Bell, it's surf sail australia.http://www.surfsailaustralia.com.au/listProductByBrand/Tyronsea/Windsurfing/Bits+and+Pieces
As I said the cup looks the same but the brass insert and base looks a smaller diam than yours unfortunately.
Unless you convert over to these?
In my pile of bits I have 1 tyronsea set and 2 1/2 of these other types.
good to know the tyronsea stuff is available, that may be the way it goes.
I hate changng the bases around, and am looking forward to racing 2 landboards together
check the hydrodynamix page www.hydrodynamix.com.au
they have all the tyronsea stuff
The actual connection looks more like Windrush to me. I don't think you can get these new any more but may be lucky to find one in an old parts bin.
