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Sorry for the delay in responding … it's been a bit crazy lately, and I needed to look up the parts you mentioned since I'm unfamiliar with them.
Two HL57s, with the 5" length (facing up) bolted into the brick with tapcon screws.
The only "A23" I could find was this angle clip.
I'm not quite sure what you meant … does the 7" extension rest on the A23s bolted into the pallet (i.e., metal-to-metal surface contact)?
Thanks again for taking the time to respond.
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