Just looked at a photo of a capricorn that just sold on ebay in melbourne [ Item number: 290393887668 3rd pic along] and it has what looks like a similar design to what was on my more modern shortboard bombora.
A moulded plastic rectangular top cover that goes over a bottom plate and the bottom plate has two bolts with flat nut plates. of normal mast track design...
so a two bolt design.
2 screws are undone on the top moulding making it possible to slide forward or backwards on the bottom plate. [onto this setup went a knurled knob that twisted into position.] see photo below.
if I am correct the photo shows the part that is usually broken or missing,
indeed in the ebay capricorn it looks like this is missing assuming that what i can see in the photo is as I describe above.
...if this is the type ? then a simple fin box mast base of any description would be appropriate to totally replace what is still left of said base...mine was in pink plastic and the one on the ebay listing the same...if you obtained this board then you may be lucky to simply fit a finbox mastbase design in place of the structure...this photo looks similar to mine but the track does look different sturdier....perhaps an aluminium mast box.
a simple way to test is to measure the width of the finbox slot and if the mast base slot is similar width then you are inbusiness with modern bases.
even if the mastbase slot is wider than the fin slot then a simple wider bottom nut can be made from sheet stainless and a thread put in it to take a standard fin slot mast base...simple as that...most moving mast tracks from nearly any longboard can be fitted with a modern mast base by simply making a wider bottom threaded plate after removing all the moving parts, obviously the mast base can not be moved while saling,.
hope this is helpful
I am after for my older Bombora longboard the round mast base that goes directly into a hole with a tab that stops the round male nose turning so the upper section turns and compresses a rubber o ring which expands and grips the internal female hole thus creating friction to hold it in place, the top of it is a serated circular handhold, which has a rectangular base with a rope tendon which connects into a bullet shaped mast plug..
there usually are two mounting holes on board all earlier bomboras that used this, later ones used the fin box mast track system that is standard today,
asking if anyone can supply one, id even buy a complete smaller board if it had one so i can use the longboard
