Hey that's not too bad a haul!
The SM's are capable of 14Mbps aggregate throughput each.
The AP's are older and can only do 7Mbps aggregate, so it would be better to buy some more AP's that are 5750AP models instead of the 5700AP ones you have.
A single 5750AP will handle 50 or more SM's easily.
The website/company has changed for these radios, but the firmware and manuals and stuff are all current for them!
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