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Paul,
is the Carina cluster the same as the one in my "Christmas Comet" posting (NGC2516 or similar)?
A pier is simple.
Get a piece of steel tube, mine is about 150mm with a wall thickness of about 5mm.
It is only 600mm tall, but with the SCT you will need more, obviously.
In my case I welded a flat plate to the bottom, and drilled four holes at the corners.
I dug a significant hole, and poured a "plug" of concrete, throwing some old steel pipe etc in as reinforcing. As the concrete was setting I placed four bolts in the stuff, with the threads exposed. Once set I place the plate and hols over the bolts, and tighten it down with nuts/washers. Simple.
OK the top in mine is open, and similar in size to the G-11 base, but you could simply weld another flat plate onto the top for the LX base, or wedge, whatever.
Need some pictures?
Gary
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