Nacra 5.x mast section

the 1980s Nacras almost all used the same mast section. Does anyone have a proper description/dimensions for this section and/or an equivalent carbon mast section? I have a line on couple of carbon masts and am trying to figure out if they will work or if I will have to change my mast base/stepping system.

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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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I'd be interested in some related info to this as I heard some early Nacra 18 square masts were thinner/weaker than later ones. Any info on what switched and when between all the boats would be nice to know.
here you go. late 80's early 90's 5.8 mast section
j
http://www.thebeachcats.com/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=125941&g2_serialNumber=3

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Aquacat 12 (sold)...'87 Nacra 5.8 (sold)...'03 Nacra Inter18 (sold)
Venture 15 (sold)....'89 Nacra 5.8 (sold)...'91 Nacra 5.8NA (sold)
'99 Nacra Inter20 (sold)
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Awesome thanks!

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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Just to confirm / answer my own question. I emailed NACRA and they said the mast section didn't change between the 5.X boats and was always the same between the boats. Even the new extrusion which is technically different from the old one they said was designed to have the same strength / flexibility