The total number of users connecting at any given time fluctuates so I really am not sure on a specific number of users. I would say at any time there is no more than 50. I had not considered running a second AP next to our existing one. Would this solution operate seamlessly or would users have to switch manually to AP1 or AP2? Would adding one or two repeaters operating at over 100ft from the main AP still cause interference?
The firmware version is: 4.21.1 although on Linksys forums lock up issues seemed to be prevalent through out all the firmware updates.
I had not considered 3rd party firmware as I am unfamiliar with the reliability.
If there is one that has been reported to be very stable I would consider using it.