Astrodon is probably out on more than just price. Its 45mm thick including the thinnest adapters. I am using mine on the Honders and that is the thinnest I can get it.
I have a couple of the SX OAG. They are a bit light weight and only so so quality. If everything is snugged down it might be allright but the part the guide cam attaches to can rock in its slot. Tolerances are a bit poor.
Greg.
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