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Hi Malcolm. The pier is a work in prgress. I'll buy 1 meter of M12 threaded rod, drill a concrete anchor into the slab and then screw the rod in and pull it all down from the bottom of the two plates. Three small feet at the bottom will allow me to drop any cables down the centre ( holes already drilled in the lower plate ) and keep things tidy. No concrete or internal fill needed hopefully but it's an option.
For anyone interested the current wieght of the OTA is 4.6 kilos but a wee bit more can be removed although I have some extras to add as well. It is surprisingly rigid and aligned, a tribute to the value of accurate jigging and measuring for parts.
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